Cost and Management Audit · Operational Audit and Internal Audit under Companies Act, 2013

Operational Audit Techniques and Report Format

Updated 11 October 2026 · Fact-checked

Operational audit is a review of how economically, efficiently and effectively a function or process works, not just whether figures are correct. You solve questions by stating the objective, listing the techniques and checklist points for the function, noting findings with cause and effect, and giving recommendations and follow-up.

Understand Operational Audit Techniques and Reporting

A financial audit asks, "Are the accounts true and fair?" An operational audit asks, "Is this function being run well?" It looks at purchase, production, sales, stores, HR or any other process, and tests it against the three Es: economy (resources bought at the lowest reasonable cost), efficiency (maximum output from inputs) and effectiveness (goals actually achieved).

Because there are no fixed statutory criteria, the auditor must first set criteria: budgets, standards, past performance, industry benchmarks, policies and procedures. A finding is a gap between criteria and what actually happens.

The work is organised through an audit programme and checklists. The programme lists the steps to perform for a function. The checklist or questionnaire turns each step into specific questions, such as "Are purchase orders issued only against approved requisitions?" The auditor then gathers evidence with techniques such as inquiry, observation, walkthrough, document inspection, analytical review, sampling and data analysis.

The output is a report. A good operational audit report is constructive. For each finding it gives the condition, the criteria, the cause, the effect and a recommendation. It also records management's response and a time-bound action plan. The audit is not complete until a follow-up confirms that agreed actions were taken.

In the Companies Act, 2013 context, internal audit under section 138 can cover operational areas. Section 145 deals with the statutory auditor's report. Operational audit reports are usually internal reports to management or the audit committee, not statutory reports.

Key rules to remember

Three Es of operational audit: Economy = cost of inputs vs. benchmark; Efficiency = output ÷ input; Effectiveness = actual result vs. planned objective; Frame each finding under one of the three Es. A function can be efficient but not effective.
Structure of a finding: Finding = Condition + Criteria + Cause + Effect + Recommendation; Use this five-part structure for every observation. Missing cause or effect loses marks.
Capacity utilisation: Capacity utilisation (%) = Actual output ÷ Normal or rated capacity × 100; Useful production indicator. Always state which capacity base you use.
Material yield: Yield (%) = Actual output ÷ Input quantity × 100; Wastage (%) = 100 − Yield; Compare with the standard yield to assess production efficiency.
Stock turnover: Inventory turnover = Cost of materials consumed ÷ Average stock; A low ratio suggests overstocking or slow-moving items. Compare with the industry norm or past trend.
Order-to-delivery variance: Delay (days) = Actual delivery date − Promised delivery date; A supplier performance measure in purchase audit.

How to solve Operational Audit Techniques and Reporting questions

Use this sequence for any question on techniques, checklists, area reviews or report writing.

1Identify the function or process in the question (purchase, production, sales, stores, HR) and state the audit objective in one line.
2Set the criteria: budget, standard, policy, benchmark or past trend. Without criteria, a finding has no basis.
3List the techniques to be used and match each to the area: inquiry, observation, walkthrough, document review, ratio and trend analysis, sampling.
4Give function-specific checklist points as short questions or review areas, covering economy, efficiency and effectiveness.
5If data is given, compute the relevant ratios and compare them with the standard to form findings.
6Write each finding as condition, criteria, cause, effect and recommendation.
7State the report format: title, objective and scope, methodology, findings, recommendations, management response, action plan with dates and owners.
8Close with follow-up: who checks, when, and how closure is evidenced.

Quickest way: The 5-line operational audit answer

When to use it: Use when a question asks for a checklist, areas of review or key observations for a function in a short time.

Write the objective and the three Es in one line.
Give 5 to 6 checklist points for the function, each in a few words.
Name 2 or 3 techniques, such as walkthrough, sampling and ratio analysis.
State 2 findings with cause, effect and recommendation.
End with the report sections and a follow-up line.

Common mistakes in Operational Audit Techniques and Reporting

Treating operational audit like a financial audit and checking only accuracy of records.
Most audit study is on verifying figures, so students default to vouching and totals.
Fix: Always bring in economy, efficiency and effectiveness. Ask whether the process is well run, not just whether it is recorded correctly.
Listing checklist points with no criteria or benchmark.
Students write generic questions and forget what the function is measured against.
Fix: Name the standard for each point: budget, policy, past trend, industry norm or rated capacity.
Writing findings without cause, effect or recommendation.
Students describe the problem and stop.
Fix: Use the five-part structure. The cause explains why it happened, the effect shows why it matters, and the recommendation is the fix.
Writing a fault-finding, blaming report.
Students confuse audit with investigation.
Fix: Keep the tone constructive and fact-based. Include management's response and focus on improvement.
Skipping follow-up.
Students treat the report as the final step.
Fix: State that follow-up checks closure of agreed actions against dates and owners, and that unresolved items are escalated to the audit committee or top management.
Presenting an operational audit report as a statutory report under the Companies Act.
Section 145 and similar provisions on auditor's reports sit nearby in the syllabus.
Fix: Say that operational audit reports are internal management reports. Statutory reporting rules, such as signing and reading qualifications before the general meeting under section 145, apply to the auditor's report on the company's accounts.

Worked examples

Example 1

A manufacturing company's internal auditor reviews production. Normal capacity is 50,000 units a month. Actual output was 41,000 units. Material input was 52,000 kg against a standard of 1 kg per unit of good output, and the standard allows 4% wastage on input. Compute capacity utilisation and yield, compare yield with standard, and give the key findings.

Show the solution

Capacity utilisation = 41,000 ÷ 50,000 × 100 = 82%.
Yield = Actual output ÷ Input = 41,000 ÷ 52,000 × 100 = 78.85% (approx.), so wastage = 21.15%.
Standard yield: with 4% allowed wastage, the standard yield is 96%. Standard output from 52,000 kg would be 52,000 × 96% = 49,920 units.
Actual yield of 78.85% is far below 96%. Output shortfall against standard = 49,920 − 41,000 = 8,920 units.
Findings: Condition: yield is 78.85% (about 17.15 percentage points below the 96% standard). Criteria: standard yield 96%. Cause: to be established by observation and review of rejection and scrap records, such as machine downtime, quality of material or operator skill. Effect: 8,920 units of lost output. Recommendation: investigate causes, tighten material inspection, and set a monthly yield review.
Follow-up: re-test yield after the next quarter and report the trend to management.

Answer: Capacity utilisation is 82%. Yield is about 78.85% against the 96% standard, giving a shortfall of 8,920 units. The report should record condition, criteria, cause, effect and recommendation, with a follow-up on yield.

Example 2

Prepare an operational audit programme and checklist for the purchase function of a mid-sized Indian manufacturing company, and state the format of the report.

Show the solution

Objective: assess whether purchasing obtains the right quality, quantity, price and delivery at the lowest reasonable cost, in line with company policy.
Criteria: approved purchase policy, budgets, approved supplier list, market price benchmarks and past supplier performance.
Programme and checklist: Are purchases made only against approved requisitions linked to production or stock plans? Is there a documented process for supplier selection and approval? Are competitive quotations or tenders obtained above set limits? Are order quantities economic, considering reorder levels and carrying cost? Are orders placed on time to avoid stock-outs or urgent buying at higher prices? Are goods received checked for quantity and quality, with rejections tracked? Is supplier performance on price, quality and delivery measured? Are bills matched to order and receipt before payment?
Techniques: walkthrough of a purchase cycle, sampling of purchase orders, comparison of rates paid with market or past rates, analysis of delivery delays and rejection percentages, and inquiry with purchase and stores staff.
Report format: title and date; objective and scope; criteria and methodology; findings (condition, criteria, cause, effect, recommendation); management response; action plan with owner and date; follow-up status.
Follow-up: review the action plan after an agreed period and report closure to the audit committee or top management.

Answer: The programme covers requisition, supplier selection, competitive pricing, order quantity and timing, receipt inspection, supplier rating and bill matching. Techniques are walkthrough, sampling, rate comparison and inquiry. The report states objective, scope, findings, recommendations, management response, action plan and follow-up.

Exam tips

Structure answers under the three Es and the five-part finding. Examiners reward a clear structure and application to the facts given.
For function-wise questions, learn 5 to 6 checklist points each for purchase, stores, production, sales and HR, so you can write them quickly.
When figures are given, compute the ratio first, compare it with the standard, and then comment. A number without a conclusion earns little.
In the MCQ section, expect questions on the purpose of operational audit, its criteria, report contents and follow-up. Remember it is an internal, constructive, management-oriented review.
Do not cite a section of the Companies Act unless the question asks. If you do, keep to what you are sure of: section 138 for internal audit, section 145 for the auditor's report.

Practice questions from Operational Audit and Internal Audit under Companies Act, 2013

Operational Audit Techniques and Reporting in other exams

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

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Operational Audit Techniques and Reporting: frequently asked questions

What is the difference between operational audit and financial audit?

A financial audit checks whether the financial statements are true and fair. An operational audit checks whether a function or process is economical, efficient and effective. It has no fixed statutory criteria, so the auditor sets them from budgets, policies and benchmarks.

What should an operational audit report contain?

It should state the objective and scope, the criteria and method used, findings, recommendations, management's response and an action plan with owners and dates. Each finding is best written with condition, criteria, cause, effect and recommendation. A follow-up status is also included.

What is the role of follow-up in operational audit?

Follow-up confirms that the actions agreed with management were actually taken and that they worked. The auditor checks against the action plan and reports closure or delay. Unresolved items are escalated to top management or the audit committee.

Is an operational audit report a statutory report under the Companies Act, 2013?

No. It is normally an internal report to management or the audit committee. Section 138 provides for internal audit of companies in the prescribed classes, and the scope can include operational areas. Statutory reporting rules, such as section 145 on signing the auditor's report, relate to the audit of the company's accounts.