Food & Beverage Controls

Chapter 1
Foundations of Food and Beverage Control

Post Graduate Program in Hotel Management
Food & Beverage Controls   •   Post Graduate

Foundations of Food and Beverage Control

Introduction

Food and beverage (F&B) control is the systematic process of planning, measuring, safeguarding, analysing and improving the use of food, beverages, labour, equipment, cash and information in hospitality operations. It connects daily operating decisions—such as purchasing, receiving, storing, portioning, pricing and service—with broader financial outcomes such as gross profit, cash flow, guest satisfaction and return on investment.

Control is not synonymous with restriction. An effective control system enables managers to provide consistent guest value while reducing avoidable waste, leakage, error and inefficiency. In a hotel, restaurant, bar, banquet operation or institutional food-service unit, control exists wherever resources are transformed into an experience for which a guest pays.

F&B control is particularly important because food and beverage operations commonly face variable demand, perishable inventory, fluctuating purchase prices, multiple points of sale, complex recipes, cash transactions and substantial dependence on employee behaviour. A small daily variance in portion size or purchasing price can become a significant annual loss when multiplied by hundreds of transactions.

Learning Objectives

After studying this chapter, the learner should be able to:

  1. Explain the meaning and scope of F&B control.
  2. Distinguish control terminology, including standards, budgets, variance, accountability and corrective action.
  3. Classify food and beverage costs and revenues appropriately.
  4. Differentiate controllable from uncontrollable costs.
  5. Explain contribution, gross profit, operating profit and related profit concepts.
  6. Relate operational control to guest value and financial performance.
  7. Identify the responsibilities of managers and departments in a control system.
  8. Apply foundational control concepts to a practical hospitality case.

1. Meaning and Scope of F&B Control

A control system compares actual performance with a predetermined standard and initiates action when a meaningful deviation occurs. The standard may concern quantity, quality, time, cost, revenue, productivity, safety or guest experience.

A useful control cycle consists of five linked stages:

  1. Planning: Establish objectives, forecasts, budgets, menus, recipes, staffing plans and purchasing policies.
  2. Standard setting: Define expected quantities, prices, yields, service levels and procedures.
  3. Measurement: Record actual purchases, issues, sales, waste, labour hours, guest feedback and cash receipts.
  4. Comparison: Identify and interpret differences between actual and standard performance.
  5. Corrective action: Modify procedures, training, purchasing, pricing, scheduling or resource allocation.
Food and beverage control cycle Control cycle PlanningStandardsMeasurementComparisonCorrective actionReviewFeedback
Food and beverage control cycle
Figure: Food and beverage control cycle

Figure: The continuous control cycle linking planning, measurement, comparison and improvement.

The scope of control extends across the entire operating cycle:

  • Concept and menu: menu engineering, recipe design, pricing and sales forecasting.
  • Purchasing: supplier selection, specifications, quotations, ordering and authorization.
  • Receiving: quantity, quality, price, temperature, packaging and documentation checks.
  • Storage: security, rotation, temperature, stock records and access control.
  • Production: recipe adherence, yield, portioning, waste monitoring and hygiene.
  • Service and sales: order recording, billing, discounts, voids, complimentary items and cash handling.
  • Accounting and analysis: cost classification, variance analysis, departmental reporting and corrective action.

2. Essential Control Terminology

Standard

A standard is a predetermined level of performance considered acceptable or desirable. Examples include a 180-gram cooked steak portion, a maximum beverage pour variance, a target food-cost percentage, or a prescribed receiving temperature. Standards must be realistic, measurable and communicated.

Budget

A budget is a quantified plan for a defined period. It may state expected covers, sales, purchases, labour hours, expenses and profit. A budget is not merely a financial prediction; it is also a coordination and accountability instrument.

Forecast

A forecast is an estimate of future demand or performance based on available information. Forecasts may use historical occupancy, reservations, events, seasonality, weather, local competition and current booking patterns. A forecast differs from a budget because it is revised as new information becomes available.

Actual performance

Actual performance is what occurred during the period, as evidenced by records such as invoices, point-of-sale reports, inventory counts, payroll records and waste sheets.

Variance

A variance is the difference between actual and standard or budgeted performance. A favourable variance improves the relevant result; an unfavourable variance worsens it. Interpretation depends on context. A lower-than-budget food cost may be favourable, but it could also indicate under-portioning, poor quality or stock omissions.

For a cost item, the basic variance is:

Cost variance = Actual cost − Standard or budgeted cost

A positive result indicates an unfavourable cost excess, while a negative result indicates a cost saving, provided the same volume and accounting basis are being compared. Variance analysis is meaningful only when volume, product mix, prices and accounting periods are considered.

Accountability

Accountability is the obligation to explain performance and take responsibility for decisions within one’s authority. It should not be confused with blame. A chef may be accountable for recipe compliance but not for an unexpected supplier price increase outside the chef’s authority.

Responsibility centre

A responsibility centre is an organizational unit whose manager is responsible for specified revenues, costs, assets or profits. A restaurant may be a cost and revenue centre; a stewarding department may primarily be a cost centre; a hotel food division may be treated as a profit centre.

Internal control

Internal control comprises policies and procedures designed to safeguard assets, ensure reliable records, promote operational effectiveness and support compliance. Separation of duties, authorization limits, inventory counts and reconciliation are examples.

Leakage

Leakage is the loss of potential revenue or inventory through theft, unauthorized consumption, incorrect billing, unrecorded sales, excessive waste, errors or weak procedures. Leakage may be deliberate or accidental.

3. Objectives of Food and Beverage Control

The central objective is to achieve an appropriate balance among cost efficiency, revenue generation, quality, safety, employee capability and guest value. Important objectives include:

Protecting assets

Food, liquor, equipment, cash, data and time are organizational assets. Restricted access, secure storage, controlled keys, authorized requisitions and independent cash reconciliation reduce loss.

Maintaining quality and consistency

A control system should protect—not undermine—product quality. Standardized recipes, specifications and portion tools support consistent taste, appearance, nutritional composition and cost.

Controlling cost and waste

Control identifies avoidable costs such as over-purchasing, spoilage, overproduction, excessive trimming, incorrect storage, breakage and inefficient labour deployment.

Maximizing revenue opportunities

Control includes accurate billing and effective selling. A restaurant can suffer despite excellent cost control if staff fail to record sales, servers do not communicate specials, or menu prices do not reflect current costs and guest willingness to pay.

Supporting planning and decision-making

Reliable control information enables decisions about menus, suppliers, staffing, opening hours, outsourcing, promotions and capital investment.

Ensuring compliance

Operations must observe food-safety law, licensing requirements, tax rules, alcohol regulations, employment legislation, allergen disclosure requirements and financial reporting policies.

Improving guest value

Guest value is the guest’s assessment of benefits received relative to the total price and non-monetary sacrifices such as waiting, inconvenience or perceived risk. Cost reduction that damages quality may reduce value and future demand. The objective is therefore not minimum cost, but sustainable value at an acceptable cost.

4. Responsibilities for Control

Control is a shared managerial responsibility, although specific duties must be clearly assigned.

Role or departmentTypical control responsibilities
General managerApproves policies, targets, authority limits and performance reviews
F&B managerCoordinates budgets, menus, sales, labour, service standards and analysis
Executive chefControls recipes, yields, production, quality, waste and kitchen labour
Purchasing officerObtains approved goods at appropriate price, quality and terms
Receiving clerkVerifies quantity, specification, condition, temperature and invoice details
StorekeeperMaintains security, stock rotation, records and issue procedures
Outlet managerControls service, billing, voids, discounts, staffing and guest recovery
Finance departmentReconciles records, reports results and supports independent verification
EmployeesFollow procedures, record transactions, protect resources and report irregularities

Effective control requires segregation of incompatible duties. For example, the person who orders goods should not be the sole person who receives them and approves payment. In a small operation, complete segregation may be impossible; compensating controls such as managerial review, surprise counts and supplier statement reconciliation become important.

5. Cost Classifications

No single classification answers every managerial question. Costs should be classified according to the decision being made.

Product and period costs

A product cost is assigned to goods produced or sold, such as ingredients in a menu item. A period cost is charged to the period in which it is incurred, such as office administration or advertising.

Direct and indirect costs

A direct cost can be traced economically to a specific product, outlet or event. Ingredients for a banquet menu are direct costs of that banquet. An indirect cost supports several products or departments and requires allocation, such as central purchasing administration or shared utilities.

Fixed and variable costs

A fixed cost remains constant within a relevant operating range for a specified period, regardless of short-term volume. Examples may include a lease payment or salaried management cost. A variable cost changes with activity, such as ingredients, some casual labour and transaction fees.

The distinction is conditional. A cost can be fixed in the short term but variable in the long term. Labour may be fixed for a weekly roster yet variable across seasons. Utilities may contain both fixed and variable components.

Semi-variable or mixed costs

A mixed cost contains fixed and variable elements. A utility bill with a standing charge plus usage charge is an example. Treating all mixed costs as purely fixed or purely variable can distort forecasts.

Controllable and uncontrollable costs

A cost is controllable when a manager can influence its amount within a defined period and authority. It is uncontrollable when the manager cannot materially influence it during that period. The classification is relative to the manager and time horizon.

For example, a restaurant manager may control casual labour scheduling, overtime approval, waste and complimentary items. The manager may not control the hotel’s allocated insurance, a long-term lease or a corporate accounting charge. A cost that is uncontrollable at outlet level may be controllable by senior management.

ClassificationMain question answeredExample
Direct/indirectCan the cost be traced economically?Banquet ingredients / shared electricity
Fixed/variableHow does cost respond to activity?Lease / ingredients
Controllable/uncontrollableCan this manager influence it now?Overtime / allocated rent
Product/periodWhen is it assigned or expensed?Menu ingredients / administration

Managers should avoid using classifications mechanically. For menu pricing, direct variable cost is often particularly relevant. For annual investment decisions, fixed and committed costs become relevant. For performance evaluation, controllability is essential for fairness.

6. Revenue Classifications and Measurement

F&B revenue may be classified by outlet, meal period, product category, service channel, customer segment, event type or payment method. Typical categories include restaurant food, alcoholic beverages, non-alcoholic beverages, room service, banquets, conferences, minibar and employee meals.

Important distinctions include:

  • Gross sales: sales before deductions such as discounts, allowances and returns.
  • Net sales: gross sales less authorized discounts, returns and allowances.
  • Cash sales and credit sales: classified by settlement method rather than product.
  • Recorded revenue and actual consumption: recorded sales may differ from consumption when items are complimentary, wasted, stolen or consumed by employees.
  • Operating revenue and other income: normal F&B sales differ from incidental gains or non-operating income.

Revenue controls include sequential checks, point-of-sale authorization, reconciliation of covers to checks, review of voids and discounts, independent cash counts, credit-card settlement checks and investigation of unusual patterns. Technology improves visibility but does not eliminate risk: incorrect user permissions, shared passwords, system overrides and poor data integration can create new control weaknesses.

7. Profit Concepts and Core Relationships

Gross profit and gross profit percentage

For an F&B department:

Gross profit = Net sales − Cost of sales
Gross profit percentage = (Gross profit ÷ Net sales) × 100

Cost of sales generally represents the cost of food and beverages consumed or sold during the period. It is not necessarily identical to purchases.

A common inventory-based relationship is:

Cost of sales = Opening inventory + Purchases − Closing inventory

This formula assumes inventory is valued consistently, transfers and staff meals are properly recorded, and adjustments for waste, spoilage and complimentary consumption are included appropriately. If inventory records are inaccurate, calculated cost of sales will also be inaccurate.

Prime cost

Prime cost usually combines cost of sales and labour directly associated with the operation:

Prime cost = Cost of sales + Direct labour cost

Prime cost is useful because these are often the largest operating costs under day-to-day management influence. Its definition should be stated clearly because organizations differ in whether they include supervisory labour, payroll taxes or employee benefits.

Contribution and contribution margin

Contribution is the amount remaining after variable costs have been deducted from sales. At product or outlet level:

Contribution = Sales − Variable costs
Contribution margin ratio = (Contribution ÷ Sales) × 100

Contribution helps evaluate incremental decisions, such as accepting an additional banquet when spare capacity exists. It should not be mistaken for profit because fixed costs remain to be covered.

Operating profit

A simplified departmental relationship is:

Operating profit = Net sales − Cost of sales − Labour cost − Other operating expenses

The exact presentation depends on the organization’s chart of accounts. Allocated corporate expenses may be shown below departmental operating profit rather than within it. Managers must understand the reporting convention before comparing results.

Worked example

An outlet reports net sales of ₹1,200,000. Cost of sales is ₹420,000, direct labour is ₹300,000 and other operating expenses are ₹240,000.

Gross profit = ₹1,200,000 − ₹420,000 = ₹780,000.

Gross profit percentage = (₹780,000 ÷ ₹1,200,000) × 100 = 65%.

Prime cost = ₹420,000 + ₹300,000 = ₹720,000.

Operating profit = ₹1,200,000 − ₹420,000 − ₹300,000 − ₹240,000 = ₹240,000.

The figures show that a strong gross profit percentage does not automatically guarantee a high operating profit; labour and other operating expenses consume ₹540,000 after gross profit.

8. Operational Control, Guest Value and Financial Performance

Operational control affects finance through several pathways. Accurate forecasting reduces overproduction and emergency purchasing. Recipe control stabilizes portion cost and product quality. Receiving control prevents payment for short deliveries. Inventory rotation reduces spoilage. Billing control converts consumption into recorded revenue. Labour scheduling aligns staffing with demand and protects both service quality and payroll efficiency.

The relationship is not linear or purely cost-focused. Excessive control can damage performance. For example, reducing portions below the menu promise may lower theoretical food cost while increasing complaints and repeat-visit loss. Cutting labour below the level required for safe and attentive service may create delays, errors and employee burnout. A useful control decision therefore evaluates at least four dimensions:

  1. Financial impact in the current period.
  2. Effect on quality and food safety.
  3. Effect on guest satisfaction and future demand.
  4. Effect on employee capability and ethical conduct.

This is why standards must include service and quality indicators, not only percentages. A balanced dashboard might track net sales, average check, food-cost variance, labour productivity, waste, guest complaints, online ratings, order accuracy, food-safety incidents and employee turnover.

9. Practical Control Procedures

Purchasing and receiving

Approved specifications should state brand or grade, size, quality, pack size, acceptable substitutions and delivery conditions. Purchase orders establish authorization. Receiving staff should compare the delivered goods with the purchase order and supplier invoice, inspect quality and temperature, record discrepancies and promptly transfer perishables to appropriate storage.

Storage and inventory

The principles of security, sanitation, stock rotation and accurate records are fundamental. First-expiry, first-out (FEFO) is often more appropriate than merely first-in, first-out (FIFO) for products with different expiry dates. High-value or high-risk items require more frequent counts. Physical inventory should be conducted by trained staff, with unexplained differences investigated rather than automatically written off.

Production and portion control

Standardized recipes specify ingredients, quantities, method, yield, portion size and presentation. Yield testing is important because purchase weight is not necessarily usable or saleable weight. Trimming, cooking loss and edible portion must be considered when setting a cost.

Sales and cash control

Every item served should be recorded at the time of sale. Voids, discounts, complimentary items and refunds should require appropriate authorization and a reason code. End-of-shift reconciliation should compare point-of-sale records, cash, card settlements and documented adjustments.

Waste control

Waste records should identify type, quantity, cause, department, date and estimated cost. The objective is learning, not merely recording. Recurring waste may indicate poor forecasting, oversized batches, inadequate training, supplier quality problems or menu design issues.

10. Illustrative Case: The Harbour View Hotel

Background

The Harbour View Hotel operates a 120-seat all-day dining restaurant. Management observes that reported food cost has increased from 31% to 37% over three months, while guest complaints about inconsistent portions have also increased. Sales have remained broadly stable.

Problem

The general manager initially proposes a blanket reduction in purchasing and smaller portions. The F&B manager instead requests a control diagnosis because the increase may result from price inflation, inventory error, waste, unrecorded sales or recipe non-compliance.

Analysis

The team reviews purchase invoices, recipe costs, inventory counts, waste sheets, point-of-sale reports and menu mix. It finds four causes:

  • two high-value ingredients were received short but invoices were paid in full;
  • closing inventory counts were performed by different employees using inconsistent units;
  • cooks used informal portion estimates during peak periods;
  • complimentary meals for promotional guests were not consistently coded in the point-of-sale system.

The theoretical food cost based on standard recipes is 32%. The reported 37% therefore includes both operational loss and measurement weakness.

Approach and solution

The hotel introduces supplier-specific receiving checklists, standard inventory units, weekly counts for high-value products, calibrated portion tools and mandatory point-of-sale codes for complimentary items. The chef conducts practical recipe training, while the finance department reconciles inventory movements monthly. Managers review both cost variance and guest feedback.

Outcome

After eight weeks, reported food cost declines to 33.5%, portion consistency improves and complaints decrease. The hotel does not achieve the result by simply buying less food. It improves the accuracy and discipline of the operating system while protecting the promised guest experience.

Learning points

The case demonstrates that a variance is a signal, not a diagnosis. It also shows that control depends on coordinated responsibility. Purchasing, receiving, kitchen production, service and finance each contributed to the result. Finally, a reduction in cost is meaningful only when it is achieved without compromising safety, quality or honest revenue recognition.

11. Challenges, Ethics and Contemporary Practice

Control systems face uncertainty, human judgement and changing conditions. Demand forecasts may be wrong; supplier prices may change; data may be incomplete; and employees may resist procedures perceived as surveillance. Managers should distinguish genuine inefficiency from normal variation and should avoid setting impossible targets that encourage concealment or unsafe shortcuts.

Ethical control requires accurate records, fair accountability, respect for privacy, transparent incentives and protection for employees who report irregularities. Managers must not manipulate inventory counts, defer expenses, conceal waste, misuse complimentary allowances or pressure staff to falsify sales. Food safety and allergen controls take priority over financial targets.

Digital point-of-sale systems, inventory platforms, electronic purchasing and business intelligence tools can improve timeliness and traceability. Artificial intelligence may assist demand forecasting, anomaly detection, menu analysis and waste prediction. However, AI outputs depend on data quality and appropriate governance. Human managers remain responsible for validating recommendations, protecting personal and commercial data, monitoring bias and ensuring that automated decisions do not undermine safety or fairness.

Best practice is therefore characterized by:

  • clear standards linked to operating reality;
  • reliable, timely and traceable data;
  • segregation of duties and appropriate authorization;
  • analysis of significant variances rather than indiscriminate policing;
  • accountability matched to managerial authority;
  • integration of financial, quality, safety and guest measures;
  • continuous training and constructive feedback; and
  • periodic review of whether controls still support strategic objectives.

Chapter Summary

Food and beverage control is a continuous management process that links planning, standards, measurement, comparison and corrective action. Its purpose is broader than reducing expenditure: it protects assets, supports quality, improves revenue capture, ensures compliance and creates sustainable guest value.

The chapter distinguished important cost classifications, including direct and indirect, fixed and variable, product and period, and controllable and uncontrollable costs. These classifications are decision-dependent and should not be applied without considering the manager’s authority, time horizon and purpose of analysis. Revenue control requires accurate recording, authorization and reconciliation across outlets and payment channels.

Key profit concepts include cost of sales, gross profit, prime cost, contribution and operating profit. Their formulas are useful only when definitions, inventory procedures and accounting conventions are consistent. Operational controls such as standard recipes, receiving checks, inventory rotation, portion tools, waste records and point-of-sale authorization influence both financial performance and guest experience. Effective control is therefore a balanced discipline: it seeks profitable operations without sacrificing quality, safety, ethics or long-term demand.

Key Terms

Food and beverage control: Systematic management of resources, transactions and performance in F&B operations.

Standard: Predetermined acceptable level of performance.

Budget: Quantified plan for a defined period.

Forecast: Estimate of future performance based on available information.

Variance: Difference between actual and standard or budgeted performance.

Accountability: Obligation to explain performance and take responsibility within one’s authority.

Responsibility centre: Organizational unit with assigned responsibility for revenues, costs, assets or profit.

Internal control: Policies and procedures that safeguard assets and support reliable operations and records.

Leakage: Loss of inventory or revenue through error, waste, theft or weak procedures.

Cost of sales: Cost of inventory consumed or sold during a period.

Gross profit: Net sales minus cost of sales.

Prime cost: Cost of sales plus direct labour cost.

Contribution: Sales remaining after variable costs.

Fixed cost: Cost that remains constant within a relevant range for a specified period.

Variable cost: Cost that changes with activity or volume.

Controllable cost: Cost that a particular manager can influence within a defined period.

Yield: Usable output obtained from a purchased quantity of food or beverage.

Portion control: Management of the quantity served in each portion.

FEFO: First-expiry, first-out stock rotation method.

Variance analysis: Examination of differences between actual and expected performance.

Review Questions

Short Answer Questions

  1. Define food and beverage control and state its main purpose.
  2. What is the difference between a budget and a forecast?
  3. Distinguish controllable and uncontrollable costs.
  4. State the formula for cost of sales using opening inventory, purchases and closing inventory.
  5. Why is segregation of duties important in F&B operations?

Long Answer Questions

  1. Explain the five stages of the F&B control cycle and illustrate each with a hospitality example.
  2. Discuss the major cost classifications used in food and beverage management and explain why classifications are decision-dependent.
  3. Explain the relationship among gross profit, prime cost, contribution and operating profit.
  4. Analyse how purchasing, receiving, storage, production and sales controls jointly affect guest value and financial performance.
  5. Discuss the ethical, managerial and governance issues involved in digital and AI-supported F&B control systems.

Analytical / Application Questions

  1. An outlet has net sales of ₹900,000, cost of sales of ₹315,000, direct labour of ₹225,000 and other operating expenses of ₹180,000. Calculate gross profit, gross profit percentage, prime cost and operating profit, then interpret the results.
  2. A restaurant’s food-cost percentage rises sharply while sales remain stable. Develop a diagnostic plan that separates price, quantity, inventory-recording, waste, portioning and revenue-recording causes.
  3. A manager is evaluated on labour cost but has no authority over the corporate salary allocation charged to the outlet. Explain why this may be an unfair control arrangement and propose a more appropriate performance-reporting design.

Multiple Choice Questions with Answers

Question 1

Which statement best describes food and beverage control?

A. A system used only to reduce purchasing expenditure

B. A continuous process of planning, measuring, comparing and improving operations

C. A method of recording only cash sales

D. A procedure used exclusively by the finance department

Correct Answer: B. A continuous process of planning, measuring, comparing and improving operations

Question 2

Which cost is most likely controllable by a restaurant outlet manager in the short term?

A. Long-term building rent

B. Corporate insurance allocation

C. Casual labour scheduling

D. Property depreciation

Correct Answer: C. Casual labour scheduling

Question 3

If net sales are ₹800,000 and cost of sales is ₹280,000, what is gross profit?

A. ₹280,000

B. ₹520,000

C. ₹800,000

D. ₹1,080,000

Correct Answer: B. ₹520,000

Question 4

Which formula correctly represents cost of sales when inventory is properly recorded?

A. Opening inventory − Purchases + Closing inventory

B. Purchases − Opening inventory − Closing inventory

C. Opening inventory + Purchases − Closing inventory

D. Closing inventory + Purchases − Opening inventory

Correct Answer: C. Opening inventory + Purchases − Closing inventory

Question 5

A cost that contains both a standing charge and a usage charge is generally classified as:

A. A mixed cost

B. A sunk cost only

C. A direct product cost only

D. A purely fixed cost

Correct Answer: A. A mixed cost

Question 6

Which practice most directly supports portion control?

A. Allowing each cook to estimate portions

B. Removing standardized recipes

C. Using approved recipes and calibrated portion tools

D. Increasing menu prices without reviewing recipes

Correct Answer: C. Using approved recipes and calibrated portion tools

Question 7

What does contribution measure?

A. Sales minus variable costs

B. Sales minus all fixed and variable costs

C. Purchases minus closing inventory

D. Gross profit plus fixed costs

Correct Answer: A. Sales minus variable costs

Question 8

Why should a variance not automatically be treated as evidence of employee failure?

A. All variances are favourable

B. Variances may result from price changes, volume, recording errors or external conditions

C. Standards are never useful

D. Managers cannot compare actual and planned performance

Correct Answer: B. Variances may result from price changes, volume, recording errors or external conditions

Question 9

Which control best reduces the risk of paying for goods not received?

A. Allowing the buyer to approve invoices without inspection

B. Comparing the purchase order, delivery and invoice

C. Counting inventory only once every five years

D. Using verbal orders without documentation

Correct Answer: B. Comparing the purchase order, delivery and invoice

Question 10

Why is reducing food cost through smaller-than-promised portions potentially harmful?

A. It always increases purchase prices

B. It may reduce guest value and damage satisfaction and repeat demand

C. It eliminates the need for recipes

D. It necessarily increases closing inventory

Correct Answer: B. It may reduce guest value and damage satisfaction and repeat demand

Food & Beverage Controls
Chapter 1 of 15