Master the Cambridge IGCSE Enterprise (0454) exam with this examiner-backed study guide. Learn how to secure maximum marks in Section B by applying your own coursework project experience, avoid critical calculation traps in break-even analysis, and craft perfectly balanced two-sided essays with justified rejections.
A silent scientific calculator may be used on papers where calculators are permitted (some papers are non-calculator). It must not be graphical or programmable and must hold no stored information.
AO1: AO1: Knowledge and Understanding (25%)
AO2: AO2: Application (25%)
AO3: AO3: Analysis (25%)
AO4: AO4: Evaluation (25%)
過去問と採点基準にもとづいて作成（2023–2025）。
電卓プログラム
Table mode for roots & turning points
Scientific calculator (e.g. Casio fx-991 series)
目的: Tabulate \(y\) across a range of \(x\) to locate sign changes (roots) and approximate maxima/minima.
使う場面: Solving or sketching a function when you want to find where its graph crosses or turns.
手順
Enter the function in TABLE mode, set the start, end and step, then read where the sign of \(y\) changes or where it peaks.
試験での注意: Allowed on papers where a calculator is permitted; use a silent scientific calculator with no stored content and show your method.
Statistics mode (mean, SD & regression)
Scientific calculator (e.g. Casio fx-991 series)
目的: Read the mean \(\bar{x}\) and standard deviation directly, and the gradient/intercept (and \(r\)) of a linear regression for bivariate data.
使う場面: Any data-handling, statistics, or required-practical analysis question.
手順
Enter the data in STAT mode (1-VAR or A+BX), then recall \(\bar{x}\), \(\sigma\) or the regression coefficients.
試験での注意: Allowed on papers where a calculator is permitted; use a silent scientific calculator with no stored content and show your method.
Carry exact values with Ans & memory
Scientific calculator (e.g. Casio fx-991 series)
目的: Keep full-precision intermediate values to avoid rounding errors.
使う場面: Multi-step calculations where premature rounding loses the final accuracy mark.
手順
Use Ans, STO/RCL or the M+ memory to reuse the unrounded result of each step; round only the final answer.
試験での注意: Allowed on papers where a calculator is permitted; use a silent scientific calculator with no stored content and show your method.
Equation solver — to CHECK your working
Scientific calculator (e.g. Casio fx-991 series)
目的: Use the built-in EQN/SOLVE mode to verify roots of quadratics or simultaneous equations you have already solved by algebra.
使う場面: As a check only, after solving by hand.
手順
Enter the coefficients in EQN mode (or use SOLVE) and confirm they match your worked solution.
試験での注意: Allowed on papers where a calculator is permitted; use a silent scientific calculator with no stored content and show your method.
よくあるミス
1high影響する配点: 4Financial records
Leaving break-even quantity as a decimal fraction (e.g. 52.63 leaflets or tickets) instead of rounding up to a whole unit (53).
回避方法: Always round up to the next nearest whole unit when calculating break-even quantities for solid items, leaflets, or tickets. Fractional units cannot be printed or sold.
2high影響する配点: 15Opportunities
Failing to write a balanced, two-sided evaluation in the 15-mark essay questions (Section B), describing only positive aspects.
回避方法: To access Level 4 marks, you must analyze both positive and negative elements (pros and cons) of both proposed options before formulating your decision.
3high影響する配点: 4Opportunities
Omitting a justified rejection of alternative options in 15-mark evaluation questions.
回避方法: In your final recommendation section, explicitly state why you rejected the alternative choice and explain why its risks or limitations outweighed those of your selected path.
4high影響する配点: 10The enterprise process
Writing purely theoretical textbook answers for questions targeted at the candidate's own enterprise project in Section B.
回避方法: Embed precise localized evidence in your answers, such as exact budgets, specific currency symbols, the names of local stakeholders involved, or the concrete materials used.
5medium影響する配点: 3Sources of finance
Reversing trade credit benefits by discussing the enterprise offering credit to customers instead of obtaining it from suppliers.
回避方法: Remember that trade credit is a source of finance where the enterprise delayed paying its suppliers for raw materials, helping to manage initial cash flow.
6medium影響する配点: 3Action plans
Confusing Action Plans with Business Plans.
回避方法: An action plan is a sequential checklist of physical tasks with responsible persons and deadlines. A business plan is a comprehensive strategic document that includes marketing, operations, and financial targets.
7medium影響する配点: 2Types of communication
Treating non-verbal communication as written/printed handouts, flyers, or online posts.
回避方法: Define non-verbal communication strictly as physical body cues, facial expressions, eye contact, gestures, or personal appearance.