Cost and Management Audit · Management Audit in Different Functions

Management Audit of Purchasing and Stores Function

Updated 11 October 2026 · Fact-checked

Management audit of purchasing and stores is an independent review of how a firm buys, receives, holds and issues materials. You check policy, vendor selection, purchase procedure, inventory levels, stores control and wastage, then judge economy, efficiency and effectiveness, and recommend improvements to management.

Understand Management Audit of Purchasing and Stores

Management audit looks at how well management does its job. It does not stop at whether the figures are right. For the materials function, it asks whether the firm buys the right item, in the right quantity, at the right price, from the right source, at the right time, and then keeps it safely until it is used.

The function has two linked parts. Purchasing covers procurement policy, requisition, vendor selection, price negotiation, ordering and follow-up. Stores covers receipt, inspection, storage, issue, records and disposal of scrap and surplus.

Material is often the largest cost in a manufacturing firm. A small saving in price, a lower stock holding or less wastage flows straight into profit. A weak function causes the opposite: stock-outs that stop production, excess stock that locks up cash, and fraud through favoured vendors.

The auditor works through areas. In policy, check that there is a written procurement policy approved by management, with delegated limits of authority. In vendor selection, check a vendor register, evaluation criteria (quality, price, delivery, service), competitive quotations and periodic rating. In procedure, check that each order follows an approved requisition and that the order, receipt and invoice are matched. In inventory levels, check that reorder level, minimum, maximum and EOQ are set and reviewed, and that slow-moving and obsolete items are identified. In stores control, check layout, security, bin cards, issue on authorised requisition, and physical verification. In wastage, check norms for normal loss, scrap and spoilage, and investigate variances.

The output is a report with findings, the effect on cost or operations, and practical recommendations. Always link a finding to its business impact.

Key rules to remember

Economic Order Quantity (EOQ): EOQ = √(2 × A × O ÷ C); A = annual usage in units, O = ordering cost per order, C = carrying cost per unit per year. Used to test whether order sizes are sensible.
Reorder Level: Reorder level = Maximum usage × Maximum lead time; Use the same time unit for usage and lead time.
Minimum Level: Minimum level = Reorder level − (Normal usage × Normal lead time); The stock below which a stock-out risk arises.
Maximum Level: Maximum level = Reorder level + Reorder quantity − (Minimum usage × Minimum lead time); Stock above this signals overstocking.
Inventory Turnover Ratio: Inventory turnover = Cost of materials consumed ÷ Average stock; Low turnover suggests slow-moving stock; compare with past periods and the industry.
Stock Holding Period: Holding period (days) = 365 ÷ Inventory turnover; Gives the average days material stays in stores.

How to solve Management Audit of Purchasing and Stores questions

Use this sequence for any question on auditing purchasing or stores, whether it asks for a checklist, a case analysis or a report.

1Identify the area asked: policy, vendor selection, purchase procedure, inventory levels, stores control or wastage. Cover only that area unless asked for the whole function.
2State the audit objective in one line, such as economy in buying or safeguarding stock.
3List what you would examine: documents, records, approvals and physical checks, using the controls expected in that area.
4If figures are given, compute the relevant measure (EOQ, levels, turnover, wastage percentage) and compare it with the norm or actual.
5Identify the deficiency or risk found, and say what it costs the business.
6Give specific recommendations that management can act on, with who should do it.
7Close with a short conclusion on whether the function is economical, efficient and effective.

Quickest way: Area, Check, Risk, Fix

When to use it: Use it for checklist and 'discuss the role of the management auditor' questions when time is short.

Write the area as a heading.
Under it give 3 to 4 audit checks as bullets, each starting with a verb such as verify, compare or test.
Add one risk line showing the cost to the business.
Add one recommendation line.
Repeat for each area; for two-part questions, split marks evenly across the areas.

Common mistakes in Management Audit of Purchasing and Stores

Writing a financial audit answer, such as checking vouchers and totals only.
Students are used to statutory audit routines.
Fix: Focus on policy, efficiency and decision quality. Ask whether management's buying and storing choices were sound, not only whether entries are correct.
Listing checks without recommendations.
Students treat the question as a checklist.
Fix: Finish every area with a practical recommendation and its expected benefit.
Treating purchase price as the only vendor criterion.
Lowest price looks like the obvious goal.
Fix: Include quality, delivery reliability, payment terms, after-sales service and vendor rating.
Mixing up reorder, minimum and maximum levels in numerical parts.
The formulas look alike and use different usage and lead-time inputs.
Fix: Write each formula with its inputs before calculating. Reorder uses maximum figures; minimum deducts normal figures; maximum deducts minimum figures.
Treating all wastage as a fault.
Students forget that some loss is inherent in the process.
Fix: Separate normal loss, within norm, from abnormal loss. Investigate and report only the excess over the norm.
Ignoring segregation of duties.
Students focus on documents rather than people.
Fix: Check that requisitioning, ordering, receiving, inspecting and paying are done by different persons.

Worked examples

Example 1

A manufacturer uses 12,000 units of a component a year. Ordering cost is ₹300 per order and carrying cost is ₹6 per unit per year. It currently orders 1,000 units each time. As management auditor, evaluate the ordering policy.

Show the solution

EOQ = √(2 × 12,000 × 300 ÷ 6) = √1,200,000 = about 1,095 units.
Current policy: orders per year = 12,000 ÷ 1,000 = 12. Ordering cost = 12 × ₹300 = ₹3,600. Average stock = 500, so carrying cost = 500 × ₹6 = ₹3,000. Total = ₹6,600.
At EOQ of 1,095 units: orders = 12,000 ÷ 1,095 = about 10.96. Ordering cost = about ₹3,288. Average stock = 547.5, carrying cost = about ₹3,285. Total = about ₹6,573.
The saving is about ₹27 a year, which is very small.
Conclusion: the current lot size is close to the optimum, so the policy is reasonable. The auditor should instead confirm that ordering and carrying cost inputs are reviewed periodically and consider supplier discounts or packing sizes.

Answer: EOQ is about 1,095 units. Current total cost is ₹6,600 against about ₹6,573 at EOQ, a saving of about ₹27 a year. The policy is broadly efficient; recommend periodic review of cost inputs.

Example 2

Discuss the points a management auditor should cover when auditing the stores function of a manufacturing company.

Show the solution

Objective: ensure materials are safeguarded, available when needed and issued only against authority, at minimum cost.
Layout and security: check that stores are laid out for easy handling, access is restricted and items are protected from damage, theft and deterioration.
Receipt: verify that goods are inspected for quantity and quality, a goods received note is raised, and discrepancies are reported to purchase.
Records: test bin cards and stores ledger for agreement, and check that issues are made only on authorised requisitions.
Stock levels: compare actual stock with reorder, minimum and maximum levels; identify slow-moving, non-moving and obsolete items and check provision or disposal action.
Physical verification: check that perpetual or periodic counts are done by persons independent of custody, and differences are investigated and approved before adjustment.
Wastage and scrap: compare actual loss with norms, and check that scrap is recorded and sold with approval.
Recommendations: use ABC analysis, set levels for key items, fix responsibility for variances and report findings to management with their cost impact.

Answer: The auditor should review stores layout and security, receipt and inspection, records and issue control, stock levels, physical verification and wastage control, and then recommend specific improvements such as ABC-based control and clear accountability.

Exam tips

Structure answers by area with short bullet points; examiners reward clear coverage across areas.
In numerical parts, show the formula first. Method marks are given even if arithmetic slips.
Always add a recommendation, since management audit is judged on usefulness to management.
For MCQs, know the distinction between reorder, minimum and maximum levels and what low inventory turnover indicates.
In case scenarios, tie your findings to the facts given, such as a single vendor, repeated stock-outs or high scrap.

Practice questions from Management Audit in Different Functions

Management Audit of Purchasing and Stores in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

CS ProfessionalInternal Audit of Inventory and Stores

Management Audit of Purchasing and Stores: frequently asked questions

How is management audit of purchasing different from a financial audit of purchases?

A financial audit checks whether purchase records are accurate and properly recorded. A management audit assesses whether the buying policy, vendor choice and quantities were economical and effective. It ends with recommendations to improve performance.

What should a purchase department audit checklist include?

Include procurement policy and approval limits, vendor selection and rating, requisition and order procedures, competitive quotations, and matching of order, receipt and invoice. Add segregation of duties and follow-up of delayed deliveries.

Which inventory measures does the auditor use in stores audit?

The auditor uses reorder, minimum and maximum levels, EOQ, inventory turnover and holding period. Ageing and ABC analysis are also used to find slow-moving and high-value items.

How do I audit material wastage?

Compare actual loss with the set norms for normal loss, scrap and spoilage. Investigate the excess, find its cause, such as poor handling or substandard material, and recommend controls.