Inventory Control & Warehousing

Chapter 15
Governance, Resilience, Sustainability and Future Directions

Post Graduate Program in Operations Management
Inventory Control & Warehousing   •   Post Graduate

Governance, Resilience, Sustainability and Future Directions

Introduction

Inventory and warehousing are no longer controlled solely through reorder points, cycle counts and storage layouts. Contemporary supply networks operate as interconnected socio-technical systems in which physical stock, data, algorithms, people, infrastructure, suppliers, regulators and communities influence one another. A warehouse may therefore be operationally efficient yet strategically fragile if it depends on one supplier, one cloud platform, one power source, or unverified inventory data.

Governance provides the rules, responsibilities and evidence through which inventory decisions are directed and controlled. Resilience is the capacity to anticipate disruption, absorb its effects, recover service and adapt. Sustainability extends the decision horizon to environmental and social consequences, including emissions, resource use, labour conditions and product circularity. Future warehouses combine automation, digital platforms, artificial intelligence and human judgement, but these technologies increase—not reduce—the need for accountability.

This chapter integrates these perspectives. It treats inventory control as a governance problem, a risk-management problem and a design problem, as well as an economic one.

Learning objectives

By the end of this chapter, students should be able to:

  1. Design governance controls for safety, security, cybersecurity, auditability, ethics, regulation and data quality.
  2. Diagnose vulnerabilities and design resilient inventory and warehousing systems.
  3. Evaluate sustainable and circular inventory policies using operational and environmental criteria.
  4. Assess omnichannel fulfilment, micro-fulfilment and autonomous warehouse designs.
  5. Specify appropriate roles for humans and artificial intelligence in inventory decisions.
  6. Critically evaluate performance measures, trade-offs and implementation risks.

1. Governance as an operating system for inventory control

Governance is the allocation of authority, accountability and decision rights. It is distinct from management: management executes plans, whereas governance determines who may make plans, under what rules, using what evidence, and with what review. In inventory systems, governance applies to master data, stock ownership, access rights, replenishment parameters, supplier approval, exception handling, physical security and records retention.

A useful governance architecture has five layers:

LayerPrincipal questionTypical control
Purpose and policyWhat outcomes and constraints apply?Inventory, safety and ethics policies
AuthorityWho may decide or approve?Segregation of duties and approval limits
ProcessHow is work performed?Standard operating procedures and escalation rules
InformationWhat evidence is trusted?Master-data controls, audit trails and reconciliations
AssuranceHow is performance tested?Audits, control testing and corrective action

A control is effective only when it is designed, implemented and evidenced. For example, a policy requiring two-person approval for a high-value stock adjustment is incomplete unless the system enforces approval, records both identities and periodically reports overrides.

The three lines of responsibility

The first line consists of warehouse and supply-chain operators who own day-to-day risks. The second line includes risk, compliance, information security and quality functions that establish standards and monitor exposure. The third line is internal audit, which independently evaluates governance and control effectiveness. External auditors and regulators provide additional, independent assurance but do not replace internal responsibility.

Segregation of duties

Fraud and error risk increase when one individual can create a supplier, approve a purchase, receive goods, adjust stock and authorize payment. A basic separation is therefore required among master-data creation, physical receipt, stock adjustment, invoice approval and payment. In smaller operations, compensating controls—such as independent review, exception reports and frequent reconciliations—may be necessary.

2. Safety, security and regulatory compliance

Occupational and process safety

Warehouse safety includes traffic separation, racking integrity, fire protection, ergonomics, hazardous-material controls, battery charging, emergency response and contractor management. Safety should be designed into the system rather than treated as training alone. Examples include pedestrian barriers, speed controls, load limits, interlocked equipment and safe methods for handling damaged or recalled products.

A leading indicator, such as completion of safety inspections, is not equivalent to a safety outcome. A balanced dashboard should include both leading measures and lagging measures:

  • leading: near-miss reporting, overdue inspections, training completion and corrective-action closure;
  • lagging: injuries, equipment damage, spills and regulatory incidents;
  • exposure: forklift hours, hazardous-material volume, peak-season labour hours and contractor hours.

Safety targets must not encourage under-reporting. A rise in near-miss reports may indicate improved reporting culture rather than deteriorating safety.

Physical security and loss prevention

Security controls protect people, inventory, facilities and information. They include perimeter control, visitor management, restricted zones, tamper-evident seals, CCTV governance, chain-of-custody records, secure disposal and investigation protocols. Controls should be risk-based: high-value, regulated, counterfeit-prone or temperature-sensitive items require stronger protection than low-value commodities.

Cybersecurity and operational technology

Warehouses increasingly depend on warehouse-management systems (WMS), enterprise-resource-planning systems, barcode and radio-frequency identification devices, robotics, sensors, transport platforms and cloud services. A cyber incident can stop physical operations even when stock remains intact.

Important controls include:

  • asset inventories for information technology and operational technology;
  • least-privilege access, multifactor authentication and timely removal of leavers;
  • network segmentation between business systems, robotics and safety-critical equipment;
  • secure configuration, patching and vulnerability management;
  • encrypted data in transit and at rest where appropriate;
  • tested backups and recovery procedures;
  • supplier-security requirements and incident-notification clauses;
  • logging, monitoring and rehearsed response plans.

Cybersecurity must include manual fallback. If scanners or the WMS are unavailable, predefined paper or offline procedures should preserve safety, stock traceability and later reconciliation. A recovery plan is credible only if it is tested.

Regulatory and ethical compliance

Inventory may be subject to product safety, customs, tax, hazardous-material, pharmaceutical, food, privacy, labour and environmental requirements. Compliance is not merely a legal department activity. Operational design determines whether lots can be traced, recalls can be executed, records can be retained and restricted goods can be blocked.

Ethical governance addresses issues that law may not fully specify. Examples include excessive worker surveillance, algorithmic productivity targets, unsafe pace-setting, supplier exploitation, discriminatory allocation during shortages, misleading sustainability claims and the disposal of usable goods. A responsible decision framework asks:

  1. Who benefits and who bears the risk?
  2. Is the decision explainable and contestable?
  3. Does it respect safety, dignity, privacy and legitimate ownership?
  4. Would the organization accept public disclosure of the practice?
  5. Are vulnerable groups disproportionately affected?

3. Auditability, data governance and control evidence

Inventory accuracy is both a physical and an information property. A stock balance may be numerically correct at one instant but unreliable if transactions are delayed, locations are ambiguous, units of measure are inconsistent or negative inventory is routinely overridden.

Data governance principles

Data governance assigns ownership and standards across the data lifecycle. Core principles include:

  • accuracy: records represent the physical and commercial reality;
  • completeness: required fields and transactions are present;
  • timeliness: updates occur within the decision-relevant period;
  • uniqueness: duplicate item, supplier and location records are prevented;
  • consistency: definitions and units agree across systems;
  • traceability: changes can be linked to an actor, time and reason;
  • security: access is appropriate to role and sensitivity;
  • retention and disposal: records are kept and deleted according to justified rules.

A data owner is accountable for meaning and quality; a data steward maintains standards and resolves defects; a system owner controls technical implementation; users remain responsible for accurate transaction capture.

Audit trails and reconciliation

An audit trail records the prior value, new value, time, user or system identity, reason and approval for a material change. It should be immutable or protected against unauthorized alteration. Reconciliation compares independent records—for example, physical count results with WMS balances, WMS shipment records with carrier confirmations, or purchase receipts with supplier invoices.

A common inventory accuracy measure is:

Inventory accuracy (%) = (Number of accurate item-location records ÷ Total item-location records tested) × 100

The measure is meaningful only when “accurate” has a defined tolerance, such as exact quantity or a specified unit variance. The sampling method, locations, item classes and counting date must also be reported. A high aggregate accuracy rate can hide serious failures in critical or high-value items.

Control risk and assurance

A practical risk assessment evaluates likelihood, impact, vulnerability and detectability. These dimensions should not be multiplied mechanically unless the organization has defined scales and accepted the resulting interpretation. Risk registers should identify the risk owner, preventive controls, detective controls, residual risk, treatment deadline and evidence required.

4. Resilient inventory systems

Resilience differs from efficiency. Efficiency often seeks minimum cost under expected conditions; resilience accepts selected redundancy, flexibility and visibility to improve performance under uncertainty. Resilience is not unlimited inventory. Excess stock can become obsolete, consume working capital and conceal process weaknesses.

Disruption types

Disruptions may be:

  • operational: equipment failure, labour shortage, picking error or system outage;
  • supply-side: supplier insolvency, quality failure, transport interruption or geopolitical restriction;
  • demand-side: sudden surges, cancellations or channel substitution;
  • infrastructural: power, water, telecommunications or facility failure;
  • systemic: pandemic, flood, cyberattack or regulatory shock.

The correct response depends on disruption duration, severity, substitutability and information quality.

Resilience design levers

  1. Visibility: shared forecasts, event monitoring, inventory-location accuracy and supplier transparency.
  2. Redundancy: qualified alternate suppliers, backup systems, spare equipment and reserve capacity.
  3. Flexibility: postponement, adaptable labour, modular processes and multi-skilled teams.
  4. Buffering: safety stock, time buffers and capacity reserves.
  5. Modularity: separable processes and interoperable systems that limit failure propagation.
  6. Collaboration: joint response plans, mutual assistance and clear escalation agreements.
  7. Learning: post-incident reviews that modify policies rather than merely assign blame.

The reorder point under uncertain demand and lead time is commonly expressed as:

ROP = μDL + SS

where ROP is the reorder point in units, μD is average demand per unit time, L is average lead time in the same time unit, and SS is safety stock in units. This expression assumes that average demand and lead time are suitably represented and that the replenishment policy uses a reorder-point logic.

If demand and lead-time variability are independent and approximately normal, a frequently used approximation is:

SS = z × √(μLσD² + μD²σL²)

where z is the chosen service-factor, σD is the standard deviation of demand per time unit, μL is mean lead time, σL is lead-time standard deviation, and μD is mean demand per time unit. Units must be consistent. The approximation excludes the covariance term and is unsuitable when demand and lead time are strongly correlated, highly intermittent, bounded, or non-normal without further modelling.

For example, if mean daily demand is 100 units, demand standard deviation is 20 units, mean lead time is 5 days, lead-time standard deviation is 1 day, and z = 1.65, then:

σLT = √(5×20² + 100²×1²) = √12000 ≈ 109.5 units

Thus safety stock is approximately 1.65×109.5 ≈ 181 units, and the reorder point is 100×5 + 181 = 681 units. This is a planning approximation, not a guarantee of a 95 percent cycle-service level in every operating environment.

Measuring resilience

Useful indicators include time to detect, time to respond, time to recover, percentage of critical demand fulfilled during disruption, alternate-source qualification rate and recovery-point compliance for digital systems. Measures should distinguish preparedness from outcomes. A network with high redundancy but poor coordination may perform worse than a leaner network with excellent visibility and rapid substitution.

5. Sustainable and circular inventory systems

Sustainability requires simultaneous attention to economic viability, environmental boundaries and social legitimacy. Inventory decisions affect emissions through production, transport, refrigeration, handling, energy use, packaging, returns and disposal.

Environmental measurement

A basic carbon estimate is:

Emissions = Σ(activity dataᵢ × emission factorᵢ)

where activity data may be kilowatt-hours, litres of fuel, tonne-kilometres, kilograms of packaging or units disposed, and the emission factor converts that activity into a common unit such as kilograms of CO₂-equivalent. Boundary definitions, factor sources, allocation methods and uncertainty must be documented. Carbon accounting should not claim precision that the underlying data cannot support.

Operational policies with sustainability implications include right-sizing packaging, reducing empty travel, using renewable electricity, improving refrigeration efficiency, consolidating shipments, increasing inventory visibility to prevent expiry, and selecting suppliers using lifecycle rather than purchase-price criteria.

Circularity

A linear system extracts resources, produces goods, uses them and discards them. A circular inventory system keeps products and materials at their highest feasible value through repair, reuse, refurbishment, remanufacture and recycling. This changes warehouse design: returns inspection, grading, parts harvesting, reverse logistics, disposition rules and secondary-market channels become core processes.

Circularity creates difficult trade-offs. A return may require transport and inspection emissions greater than the benefit of reuse. Recycling may be preferable to refurbishment for some products but not others. The relevant comparison should include total lifecycle impacts, service, safety and economic value rather than a single “green” activity.

Sustainable performance dashboard

DimensionExample measureImportant caution
EconomicCost per order, inventory turns, working capitalHigh turns can reflect stockouts
ServiceFill rate, order-cycle time, availabilityAverages can hide critical failures
EnvironmentalCO₂e per unit shipped, energy per order, waste rateBoundaries and factors matter
SocialInjury rate, turnover, living-wage coverage, grievance closureAvoid measuring only compliance paperwork
CircularityReuse rate, repair yield, recovery valueReuse must be safe and genuinely beneficial

6. Omnichannel fulfilment and micro-fulfilment

Omnichannel fulfilment integrates stores, distribution centres, suppliers, marketplaces and customer-service channels so that customers experience one coordinated promise. It differs from multichannel operation, in which channels may operate independently.

The central challenge is inventory positioning. A unit may be allocated to store replenishment, online orders, click-and-collect, returns or a wholesale customer. Available-to-promise logic must account for on-hand stock, reservations, safety stock, open receipts, expected shrinkage and channel priorities. Poor synchronization produces phantom inventory, cancellations and avoidable transfers.

Micro-fulfilment centres are small, highly automated or semi-automated facilities located near demand. They can reduce last-mile distance and improve delivery speed, but they may have higher unit costs, restricted assortment, complex replenishment and difficult labour or zoning conditions. Their economic case depends on order density, real-estate cost, automation utilization, delivery alternatives and service premiums.

A network design should compare alternatives using total cost and service, including:

  • facility and automation capital;
  • labour and maintenance;
  • inventory duplication;
  • replenishment transport;
  • last-mile cost;
  • returns handling;
  • energy and emissions;
  • resilience value and failure exposure.

Micro-fulfilment should not be adopted merely because it is technologically fashionable.

7. Autonomous warehouses and human–AI collaboration

Autonomous warehouses use robotics, machine vision, automated storage and retrieval, autonomous mobile robots, optimisation software and sensor networks. Autonomy is not binary. A system may automate movement while leaving exception decisions to people, or it may recommend replenishment while requiring human approval.

Appropriate division of work

Machines are often strong at repetitive movement, high-speed classification, pattern detection and consistent execution. Humans remain essential for ambiguous exceptions, ethical judgement, negotiation, novel failure modes, safety leadership and accountability. A robust design specifies:

  • the decision delegated to the model;
  • the data and assumptions used;
  • confidence thresholds;
  • human override authority;
  • escalation time limits;
  • logging and explanation requirements;
  • monitoring for drift and disparate impact;
  • safe failure and manual recovery.

AI-generated replenishment recommendations should be treated as decision support unless validation demonstrates reliable autonomous performance in the relevant context. Models can amplify biased historical allocations, learn from erroneous inventory records, or optimize service for profitable customers at the expense of fairness or contractual obligations.

Model governance

Before deployment, organizations should validate data lineage, performance against a representative test set, sensitivity to missing data, cybersecurity, explainability appropriate to the decision, and recovery behaviour. After deployment, they should monitor forecast error, stockout rates, override rates, drift, anomalous recommendations and outcomes by product, location and customer group. A model that improves average forecast accuracy but increases critical-item stockouts may be unacceptable.

8. Illustrative case: NorthStar Medical Distribution

Background

NorthStar Medical Distribution, a fictional regional distributor, supplies hospitals from one large distribution centre. It handles temperature-sensitive medicines, emergency products and ordinary consumables. Its online ordering service shares inventory with hospital contracts. The firm has experienced cyber outages, expiry losses and inaccurate availability promises.

Problem

Management proposed a highly automated micro-fulfilment facility near the capital. The proposal focused on faster consumer-style delivery but did not address cybersecurity, cold-chain continuity, ethical allocation during shortages or returns. A review found that item masters used inconsistent units, stock adjustments lacked reasons, and one supplier represented 62 percent of a critical product category.

Analysis

The risk assessment identified four connected exposures:

  1. A cyberattack could interrupt picking, temperature monitoring and shipment documentation.
  2. Inaccurate master data could cause unsafe substitutions or false availability.
  3. Single-source dependence could prevent hospitals from receiving essential products.
  4. A speed-oriented algorithm could allocate scarce stock to high-margin customers rather than clinical urgency.

The proposed facility also duplicated safety stock without a network-level policy, potentially increasing expiry and working capital.

Approach and solution

NorthStar adopted a staged programme:

  • appointed data owners for item, location, supplier and cold-chain records;
  • introduced dual approval and reason codes for critical stock adjustments;
  • segmented robotics and WMS networks, added multifactor authentication and tested offline procedures;
  • qualified a second supplier and established substitution protocols;
  • implemented FEFO—first expired, first out—for relevant products;
  • created a shortage-allocation committee with clinical and compliance representation;
  • piloted micro-fulfilment for fast-moving, non-temperature-sensitive items;
  • reserved human approval for emergency allocation and model exceptions;
  • measured service, expiry, energy, cyber recovery and equity outcomes together.

Outcome

After the pilot, order speed improved for the selected assortment, while temperature-sensitive products remained in the controlled central facility. The company reduced unexplained stock adjustments and detected master-data defects earlier. The financial case for full automation was postponed pending evidence on utilization and resilience. The most important outcome was not automation itself but clearer decision rights and better evidence.

Learning points

Technology cannot compensate for weak master data or unclear accountability. Resilience is achieved through a portfolio of controls, alternatives and learning mechanisms. Ethical allocation must be designed before a shortage occurs. Pilots should test failure recovery and social outcomes, not only throughput.

9. Implementation roadmap and limitations

A practical implementation sequence is:

  1. Define critical products, processes, services and stakeholders.
  2. Map physical, information and decision flows.
  3. Identify hazards, threats, legal duties and ethical risks.
  4. Assign owners and establish minimum control requirements.
  5. Correct master data and create baseline performance measures.
  6. Design redundancy, fallback and recovery procedures.
  7. Pilot technology in a bounded process with human oversight.
  8. Test normal, peak, degraded and malicious conditions.
  9. Audit evidence, review unintended effects and scale selectively.
  10. Reassess assumptions as demand, regulation and technology change.

Limitations should be made explicit. Resilience metrics may be difficult to compare across networks. Carbon results depend on boundaries and emission factors. Automation benefits can disappear at low utilization. AI performance may degrade when conditions change. Circular models may shift impacts into reverse logistics. More controls can also create bureaucracy and slower decisions. Governance should therefore be proportionate, risk-based and periodically simplified where controls no longer add assurance.

Future directions

Several developments are likely to shape inventory and warehousing:

  • digital twins that simulate inventory, capacity, energy and disruption scenarios;
  • interoperable event data shared across firms;
  • low-carbon facilities and electrified material handling;
  • robotics-as-a-service and modular automation;
  • product passports supporting repair, provenance and circularity;
  • advanced sensing for condition, location and authenticity;
  • privacy-preserving analytics and stronger software supply-chain security;
  • human-centred automation that redesigns jobs rather than merely removing tasks.

The strategic question is not whether a firm can deploy a technology. It is whether the technology improves a defined outcome, remains safe under failure, is governed by accountable people, and creates value across the lifecycle.

Chapter Summary

Inventory and warehousing governance establishes decision rights, policies, evidence and assurance. Effective systems combine segregation of duties, audit trails, master-data ownership, physical security, cybersecurity, safety controls and regulatory compliance. Resilience requires visibility, flexibility, redundancy, buffering, modularity and organizational learning; it should be measured through preparedness, response and recovery rather than inventory volume alone. Sustainable inventory management includes emissions, energy, waste, labour conditions and circular flows, with lifecycle boundaries stated clearly. Omnichannel and micro-fulfilment designs can improve service but may duplicate inventory and increase complexity. Autonomous warehouses and AI are most effective when responsibilities, override rights, validation, monitoring and safe fallback are explicit. Across all these areas, technology is an enabler of governance—not a substitute for it.

Key Terms

Governance: Direction, accountability and control of organizational decisions.

Segregation of duties: Separation of incompatible responsibilities to reduce error and fraud.

Audit trail: A record of transactions or changes showing who acted, when and why.

Data governance: Rules, roles and processes for managing data quality, access and use.

Master data: Foundational records such as items, suppliers, locations and units of measure.

Cybersecurity: Protection of information and operational systems from unauthorized access or disruption.

Operational technology: Systems that monitor or control physical processes and equipment.

Resilience: Capacity to anticipate, absorb, recover from and adapt to disruption.

Redundancy: Deliberate provision of alternative resources or pathways.

Safety stock: Inventory held to protect service against uncertainty.

Reorder point: Stock position that triggers replenishment under a reorder-point policy.

Circular economy: A system that retains products and materials at high value through reuse, repair and recovery.

Lifecycle assessment: Evaluation of environmental impacts across defined product or process stages.

Omnichannel fulfilment: Coordinated fulfilment across integrated sales and service channels.

Micro-fulfilment: A small, often automated facility located near concentrated demand.

Autonomous warehouse: A warehouse in which software and machines perform significant physical or decision tasks with limited direct intervention.

Model governance: Controls over the development, deployment, monitoring and retirement of analytical or AI models.

Human-in-the-loop: A design in which people review, approve or intervene in automated decisions.

Available-to-promise: A calculated commitment of inventory and capacity to a customer order.

FEFO: First expired, first out; a rotation policy that prioritizes the earliest expiry date.

Review Questions

Short Answer Questions

  1. Distinguish governance from management in an inventory system.
  2. Why are audit trails important for stock adjustments?
  3. Identify four resilience design levers.
  4. What is the difference between multichannel and omnichannel fulfilment?
  5. State two risks associated with autonomous warehouse systems.

Long Answer Questions

  1. Explain how safety, physical security and cybersecurity controls should be integrated in a modern warehouse.
  2. Discuss the role of data governance in inventory accuracy and regulatory compliance.
  3. Evaluate the operational and environmental trade-offs of micro-fulfilment.
  4. Explain how circular-economy principles change warehouse processes and performance measures.
  5. Develop a governance framework for human–AI collaboration in replenishment decisions.

Analytical / Application Questions

  1. A warehouse has mean daily demand of 80 units, demand standard deviation of 15 units, mean lead time of 4 days, lead-time standard deviation of 0.5 day and z = 1.65. Using the independent-variability approximation in this chapter, calculate safety stock and reorder point. State the assumptions.
  2. Design a control and recovery plan for a warehouse whose WMS is unavailable for 12 hours during peak season. Include safety, traceability, cybersecurity and reconciliation controls.
  3. A retailer is choosing between one central distribution centre and three micro-fulfilment centres. Construct a decision framework that compares cost, service, inventory duplication, emissions, resilience and ethical labour implications.

Multiple Choice Questions with Answers

Question 1

Which control most directly supports segregation of duties?

A. Allowing one employee to create suppliers and approve payments

B. Separating goods receipt from invoice approval

C. Increasing the warehouse lighting level

D. Reducing the number of cycle counts

Correct Answer: B. Separating goods receipt from invoice approval

Question 2

In the reorder-point expression ROP = μDL + SS, what does SS represent?

A. Supplier standard lead time

B. Seasonal sales

C. Safety stock

D. System stockout

Correct Answer: C. Safety stock

Question 3

Which statement best describes resilience?

A. Holding the maximum possible inventory

B. Minimizing all redundancy

C. Anticipating, absorbing, recovering from and adapting to disruption

D. Eliminating all operational variation

Correct Answer: C. Anticipating, absorbing, recovering from and adapting to disruption

Question 4

Why should warehouse cyber systems include manual fallback procedures?

A. To eliminate the need for cybersecurity

B. To preserve safe and traceable operations during system unavailability

C. To prevent all automation investment

D. To increase unauthorized access

Correct Answer: B. To preserve safe and traceable operations during system unavailability

Question 5

Which activity is most characteristic of a circular inventory system?

A. Disposing of all returned products

B. Increasing single-use packaging

C. Repairing and grading returned products for reuse

D. Ignoring reverse logistics

Correct Answer: C. Repairing and grading returned products for reuse

Question 6

What is a key risk of using an aggregate inventory-accuracy percentage alone?

A. It always overstates critical-item accuracy

B. It can hide serious errors in high-value or critical items

C. It measures cybersecurity directly

D. It eliminates the need for sampling definitions

Correct Answer: B. It can hide serious errors in high-value or critical items

Question 7

Which feature distinguishes omnichannel fulfilment from independent multichannel operations?

A. Channels use completely separate inventory records

B. Customer orders are coordinated across integrated channels

C. Only physical stores may fulfil orders

D. Returns are prohibited

Correct Answer: B. Customer orders are coordinated across integrated channels

Question 8

Which is an appropriate human–AI governance control?

A. Removing all override authority

B. Deploying a model without monitoring

C. Defining confidence thresholds and escalation rights

D. Allowing the model to change its objective without approval

Correct Answer: C. Defining confidence thresholds and escalation rights

Question 9

Using the chapter’s approximation, if μD = 100, μL = 5, σD = 20 and σL = 1, which expression gives lead-time demand standard deviation?

A. √(5×20² + 100²×1²)

B. 5×20 + 100×1

C. √(100² + 20²)

D. 100×5×20×1

Correct Answer: A. √(5×20² + 100²×1²)

Question 10

Which measure is a leading safety indicator?

A. Recorded injury count

B. Equipment damage after an incident

C. Completion of scheduled safety inspections

D. Value of disposed inventory

Correct Answer: C. Completion of scheduled safety inspections

Inventory Control & Warehousing
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