Cambridge O Level Business Studies · Syllabus 7115 · Operations Management
Margin of Safety
What is Margin of Safety?
The amount by which actual or forecast sales exceed break-even output, measured in units. It shows how far sales could fall before the business begins to make a loss, so it is a direct measure of how exposed the business is to a fall in demand.
This definition is part of the Operations Management chapter in Cambridge O Level Business Studies.
Margin of Safety in context
Production methods, cost behaviour and break-even analysis together decide whether a business can make what customers want at a price the market will support. Job, batch and flow production are not ranked best to worst; volume, variety, customisation, capital and demand stability determine which method fits a given product. Fixed costs stay the same regardless of output, while variable costs rise directly with it, and contribution per unit — price minus variable cost — sets both the break-even output and the margin of safety. Economies of scale then reduce average cost as output grows, while diseconomies of scale raise it once a business becomes too large to coordinate effectively.