What if there is more than one limiting factor?

If there are two or more limiting factors, you must use linear programming. This is a different, more complex technique you would also study for the PM exam, typically involving graphical methods or simultaneous equations.

How many hours should I spend revising limiting factors?

Focus on mastering the technique, not the clock. You should be able to solve a standard question in 15-20 minutes. Spend one or two focused 90-minute sessions practicing the five-step method, and that is more effective than five hours of passive reading.

Is contribution the same as profit?

No, and this is a critical distinction. Contribution is 'Sales Revenue - Variable Costs', while Profit is 'Contribution - Fixed Costs'. For limiting factor decisions, always use contribution because fixed costs are irrelevant in the short term.

Am I ready for the exam if I can do this calculation?

Being able to reliably execute the five-step process for limiting factor analysis means you are ready for *this* type of question. True exam readiness comes from being able to do the same for all core syllabus topics.

What's the most common reason students fail this question?

The most common mistake is ranking products by contribution per unit instead of contribution per unit of the limiting factor. This will lead to an incorrect production plan and a significant loss of marks.

Does this topic appear in other ACCA exams?

Yes, the principles of managing scarce resources are fundamental. You will see more advanced applications in Strategic Business Leader (SBL) and it provides foundational knowledge for the Advanced Performance Management (APM) exam.

What do I do if I can't identify the limiting factor?

If you are short on time in the exam, state your assumption clearly (e.g., 'Assuming labour is the limiting factor') and complete the rest of the steps. You will lose the mark for Step 1, but you can still earn all the follow-through marks for the remaining steps.

Why are fixed costs ignored?

Fixed costs are ignored because they do not change with the production volume in the short term. The decision only impacts variable costs and revenue, so we focus on contribution, which is the relevant figure for optimising profitability.

PM Performance Management

Limiting Factor Analysis Explained (PM)

Learn how to ace limiting factor analysis in your ACCA PM exam. This guide provides a step-by-step worked example, common mistakes, and examiner tips.