ACCA PM — Full Summary | Sep 2026–Jun 2027
ACCA PM · Sep 2026–Jun 2027

Performance Management
Full Summary

Complete course navigation and condensed exam-day reference for ACCA PM — 5 syllabus sections, 21 topics, 210 OT practice questions, examiner intelligence from all 7 sittings (SD22–SD25), plus every key formula and exam trap in one place.

Exam3 hours CBE
Pass mark50%
Section A15 × 2-mark OT
Section B3 cases × 5 OT
Section C2 × 20-mark CR
Topics23 lessons · A–F

Exam Structure

How the PM exam works

Section A (30 marks): 15 standalone OT questions of 2 marks each. Can cover any syllabus area A–E. Mix of MCQ, T/F, number entry, and matching.

Section B (30 marks): 3 case studies, each with 5 OT questions of 2 marks each. Cases drawn from any syllabus area. Cases often involve calculations followed by interpretation questions.

Section C (40 marks): 2 constructed response questions of 20 marks each. One question ALWAYS from Section E (Performance Measurement and Control). The other from Sections C and/or D (Decision-Making and/or Budgeting). Can also incorporate A (data analytics) and sustainability elements. Use spreadsheet tools in the exam.

Timing & Pacing Guide

Internalise this pacing before the exam, not during it. 3 hours = 180 minutes for 100 marks → roughly 1.8 minutes per mark, but Section C needs more thinking time per mark than A/B.

Section A
~50 min
15 × 2-mark OT — aim for ~3 min each; flag and move on if stuck
Section B
~50 min
3 cases × 5 OT — ~16 min per case; read the case once fully before answering
Section C
~35 min each
2 × 20-mark CR (~70 min total) — read requirements FIRST, then the scenario; leave 2 min to review
Buffer
~10 min
Final review buffer — total 50 + 50 + 70 + 10 = 180 minutes

Complete Topic Map

AManagement Information Systems & Data Analytics
  • Management information systems (TPS, MIS, EIS, ERP, CRM)
  • Uses and control of information; report distribution controls★
  • Big data: 5Vs, big data pyramid, analytics uses and risks★★
BSpecialist Cost & Management Accounting
  • Activity-Based Costing — drivers, rates, ABC vs traditional★★
  • Target costing — derive target cost, close cost gap, services★★
  • Life-cycle costing — costs by stage, pricing application★
  • Throughput accounting — bottleneck, TPAR, ranking, TOC★★
  • Environmental and sustainability accounting — cost categories, the four EMA techniques, sustainability★
CDecision-Making Techniques
  • Relevant cost analysis — incremental, opportunity, sunkSection C★★
  • CVP analysis — BEP, MOS, C/S ratio, multi-productSection C★★
  • Limiting factors — single, LP, shadow prices, slack★★
  • Pricing decisions — MR=MC, demand function, strategies★★
  • Make-or-buy, shutdown, joint products, outsourcing★
  • Risk and uncertainty — EV, sensitivity, decision treesSection C★
DBudgeting and Control
  • Budgetary systems — types, behavioural aspects, BBBSection C★
  • Analytical techniques — high-low, regression, time series, learning curvesSection C★★
  • Standard costing and flexed budgets★
  • Material mix and yield variances★
  • Sales mix and quantity variances★★
  • Planning and operational variancesSection C★★
  • Performance analysis from variances; behavioural aspects★
EPerformance Measurement and Control
  • FPIs and NFPIs; Balanced Scorecard; Building Block modelSection C★★
  • Divisional performance: ROI, RI, transfer pricingSection C★★
  • NFP and public sector: VFM, 3Es, multiple objectivesSection C★★
FEmployability and Technology Skills
  • Accessing information, the spreadsheet and word processor response tools, navigation, and presenting data for marks — assessed throughout the live CBE, not as a separate questionAll sections★★★
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Real Exam Questions — All 14 Mock Section C Questions

Every Section C constructed-response question from all 7 mock sittings, embedded directly in its topic with the full scenario and model answer.

SittingCompanyTopic
SD2022Wyeland Police ForcesE3 — NFP/VFM
SD2022Keytone CoC6 — Risk & Uncertainty
MJ2023Vegan CoD6 — Planning/Operational Variances
MJ2023Trot CoE1 — Performance Measurement
SD2023Daisy CoC1 — Relevant Cost Analysis
SD2023Lemic AirE1 — Performance Measurement
MJ2024VenhospD2 — Analytical Techniques
MJ2024Caroline CoE2 — ROI/RI/Transfer Pricing
SD2024Global Scan CoC1 — Relevant Cost Analysis
SD2024Yetgo CoE2 — ROI/RI/Transfer Pricing
MJ2025Eastern Hospitals TrustE3 — NFP/VFM
MJ2025Quality Tyre CoD1 — Budgetary Systems
SD2025Kaylene CoC2 — CVP Analysis
SD2025Klen CoE1 — Performance Measurement

Top 20 Traps — Most Repeated Examiner Errors

Deduplicated across all 7 sittings — read this list once before anything else below.

  1. Target profit = HIGHER of the mark-up method and the ROI method — not the lower, not an average.
  2. Services are HETEROGENEOUS, not homogeneous — a key reason target costing is hard to apply to services.
  3. Target costing is a FEED-FORWARD control, not feedback.
  4. Multi-product CVP: always use the WEIGHTED AVERAGE C/S ratio, not a simple average.
  5. RI: use PRE-TAX operating profit and the DIVISIONAL (not group/company-average) cost of capital.
  6. Throughput bottleneck = the stage with the LOWEST MAX OUTPUT (capacity ÷ time per unit), not the slowest-looking process.
  7. Rank throughput products by throughput PER BOTTLENECK HOUR, not throughput per unit.
  8. TPAR factory cost = ALL costs except materials, per hour — excludes non-production costs like advertising.
  9. Relevant cost of a machine = HIGHEST alternative use value (opportunity cost) — compare sale proceeds vs rental vs alternative use and take the highest; never use book value, original cost or depreciation.
  10. Minimum/relevant-cost pricing = incremental + opportunity costs only — it can erode perceived value and be hard to raise later.
  11. CVP: break-even RISES by the SAME % as a fixed cost rise; C/S ratio FALLS by MORE than the % of a price cut.
  12. VFM — “economy” must specify APPROPRIATE QUALITY at minimum cost, not just “minimising cost.”
  13. Life-cycle costing: total ALL costs across the FULL life (including decline phase) before dividing by total units.
  14. Shutdown decisions: show contribution to HO separately, then deduct reapportioned HO costs — don’t net them early.
  15. Time series (additive model): seasonal variations MUST sum to zero — use this to find a missing variation.
  16. Learning curve incremental batch time = Total time(n) − Total time(n−1), not the per-unit average difference.
  17. Shadow price is the PREMIUM over the normal price, not the total price paid for the scarce resource.
  18. Transfer pricing: spare capacity → variable cost only; full capacity → market price (reflecting opportunity cost).
  19. Sales quantity variance uses the STANDARD mix of the ACTUAL total quantity — not the actual mix.
  20. ABC only affects OVERHEAD costs — direct costs already attributed to products don’t change under ABC.

Command Word Glossary

How much depth each verb expects — misreading the command word is a common, avoidable way to lose marks.

VerbWhat it expects
State / ListBrief, factual points — no explanation needed. Fastest marks available; don’t over-write these.
ExplainState the point AND say why/how it works — one sentence of reasoning per point.
DescribeGive a detailed account of what something is or how a process works, in your own words.
DiscussPresent more than one angle — usually both a point in favour and a limitation or counterpoint.
CalculateShow the working, not just the final figure — method marks are available even if the final answer is wrong.
Evaluate / AssessWeigh up the evidence and reach a supported conclusion or judgement — don’t just describe both sides.
Advise / RecommendGive a clear, justified recommendation applied to the specific scenario — not a generic textbook answer.
IdentifyPick out the specific relevant item(s) from the scenario — precision matters more than volume.

Examiner Intelligence — All 7 Sittings (SD22–SD25)

SD22 — Sep/Dec 2022

Key errors and focus areas

  • 3Es VFM: economy, efficiency, effectiveness must each be explained precisely, not just named
  • Payoff tables: label rows/columns clearly (options vs states of nature) before calculating EV
  • Expected value of perfect information: recalculate EV assuming the optimal choice is made in EACH state, then weight by probability
  • Decision trees: always roll back right to left, showing the EV calculation at every chance node
D25 — Sep/Dec 2025

Key errors and focus areas

  • Target cost: target profit = HIGHER of mark-up vs ROI per unit — candidates used lower figure
  • Service characteristics: services are HETEROGENEOUS not homogeneous — a reason target costing is difficult
  • Target costing = FEED-FORWARD control (not feedback)
  • CVP multi-product: C/S ratio must be weighted average — show 3 d.p. as instructed
  • Balanced Scorecard: calculate ratios from raw data for both years; explain changes
  • Capital gearing: work backwards from interest cover → interest → debt → equity via gearing ratio
  • Learning rate: 2nd batch data → tabulate cumulative averages → r = avg(2 batches)/avg(1 batch)
  • Full cost-plus: NOT profit-maximising and NOT penetration pricing
MJ25 — Mar/Jun 2025

Key errors and focus areas

  • RI: use divisional (not company) cost of capital; use PRE-TAX operating profit
  • Throughput: identify bottleneck by calculating MAX OUTPUT per stage (capacity ÷ time per unit) — lowest max output = bottleneck
  • Relevant cost of machine: use HIGHEST alternative use value (opportunity cost), not original cost or resale value alone
  • Minimum pricing = incremental + opportunity costs only; can erode perceived value; hard to raise later
  • CVP T/F: break-even rises by SAME % as fixed cost rise; MOS depends on budget; C/S ratio falls by MORE than % price cut
  • Controls for report distribution: agreed circulation list updated regularly is the key control
  • VFM: 3Es definition must be complete — “economy = minimising cost” alone insufficient
SD24 — Sep/Dec 2024

Key errors and focus areas

  • Throughput ranking: rank by throughput PER BOTTLENECK HOUR — not by throughput per unit
  • TPAR > 1: throughput exceeds operating costs — TPAR < 1: costs exceed throughput
  • TPAR denominator: total factory cost PER HOUR — excludes non-production costs (advertising)
  • Life-cycle costing: total all costs across full life → divide by total units → add target profit
  • Shutdown: show separately: revenue − variable costs − attributable fixed costs = contribution to HO; then deduct reapportioned HO to get profit/loss
  • Head office reapportionment: separate clinic-specific costs from reapportioned overheads
  • Time series: additive model seasonal variations MUST sum to zero — use to find missing variation
  • Big data: analytics predicts what MIGHT happen (not will happen); not bias-free
MJ24 — Mar/Jun 2024

Key errors and focus areas

  • Relevant cost of materials: find cheapest way to obtain required amount — may combine options (convert existing + buy additional)
  • Learning curve incremental batch: use formula for cumulative average at n and n−1 batches; incremental = total(n) − total(n−1)
  • Optimal pricing MR=MC: MR = a − 2bQ; set equal to variable cost; solve for Q; then find P from demand equation
  • Market skimming: suitable for short life-cycle, high development costs, currently unique product
  • Transfer pricing: spare capacity → variable cost; full capacity → market price (opportunity cost)
  • VFM economy: focus on MONETARY input costs (staff cost %; food cost per meal)
  • Information security: apply to the scenario — non-networked computers need physical security (lockable cabinet) + confidentiality contracts, NOT firewalls
D23 — Sep/Dec 2023

Key errors and focus areas

  • CVP assumptions: contribution per unit CONSTANT; all costs fixed or variable — NOT short-term limitation; fixed cost per unit falls but TOTAL fixed cost constant
  • Sales quantity variance: (actual qty in standard mix − standard qty in standard mix) × standard margin
  • Operating gearing: use figures to verify — contribution/operating profit × 100
  • ABC: only overhead costs benefit from ABC (not direct costs already attributed to products)
  • Environmental costs via ABC: supervisor salary and training costs can have identifiable cost drivers — normal material losses and direct wages already attributed directly
  • TOC: buffer stock BEFORE bottleneck; non-bottleneck resources operate at SAME speed as bottleneck; conversion costs kept MINIMUM
MJ23 — Mar/Jun 2023

Key errors and focus areas

  • Shadow price: it is the PREMIUM over normal price (NOT the total price); resources at optimum solution have shadow price > zero
  • Standard full cost: all variable + fixed costs; fixed overhead = total fixed ÷ budgeted units
  • Transfer pricing: with spare capacity → variable cost only; at full capacity → market price (to reflect opportunity cost)
  • TOC: buffer inventory held BEFORE bottleneck; operations before bottleneck run at SAME speed as bottleneck
  • Multi-product CVP with changing mix: identify new weighted average C/S ratio for each year; find BEP from new ratio
  • ABC cost driver matching: apply business knowledge (procurement → purchase orders; maintenance → machine hours)

Key Formula Reference

Throughput Accounting
TPAR = Throughput per bottleneck hr / Factory cost per bottleneck hr
Throughput = Selling price − Direct materials
Factory cost = ALL costs except materials (labour + variable + fixed overheads). Rank products by TPAR — highest first.
Target Costing
Target cost = Selling price − Target profit
Cost gap = Current cost − Target cost
Target profit = HIGHER of (mark-up method) and (ROI method). D25 trap: always take the higher figure.
CVP Analysis
C/S ratio = Contribution / Sales revenue
BEP (revenue) = Fixed costs / C/S ratio
MOS% = (Budget sales − BEP) / Budget sales × 100
Multi-product: use weighted average C/S ratio. MJ25: BEP rises by same % as fixed cost. C/S ratio falls by more than % of price cut.
Optimal Pricing (MR = MC)
P = a − bQ; MR = a − 2bQ
b = change in price / change in quantity
Set MR = MC (variable cost), solve for Q, substitute back to find P
ROI and Residual Income
ROI = Operating profit / Capital employed × 100%
RI = Operating profit − (Capital employed × Cost of capital)
RI: use PRE-TAX operating profit; use DIVISIONAL cost of capital (not company average). MJ25 trap.
Transfer Pricing
Min TP = Variable cost + Opportunity cost
With spare capacity: Min TP = variable cost
At full capacity: Min TP = variable cost + (market price − variable cost)
Opportunity cost = contribution lost on external sales displaced.
Variances — Mix & Quantity
Sales qty variance = (Actual qty in std mix − Std qty) × Std margin
Sales mix variance = (Actual mix − Std mix of actual total) × Std margin
D23: standard quantity = actual total quantity in standard proportions. Express as favourable or adverse.
Learning Curve
Y = aX^b (cumulative average time per unit)
Incremental time for nth batch = Total time for n batches − Total time for (n−1) batches
Learning rate: if batches 1 and 2 known, r = avg(2)/avg(1). MJ24: use formula for 7 batches then 8 batches to isolate 8th batch time.
Shadow Price (Dual Price)
Shadow price = Additional contribution per extra unit of scarce resource
MJ23 trap: shadow price = PREMIUM above normal price, not total price. A resource at optimum solution has shadow price > 0. A non-scarce resource has shadow price = 0.
Relevant Cost — Materials
In inventory, not replaceable: opportunity cost (scrap/resale/alternative use)
In inventory, will be replaced: replacement cost
Not in inventory: purchase price
MJ24: if material can be obtained in multiple ways, use the cheapest combination for the required quantity.
Life-Cycle Costing
Total life-cycle cost = Development + Total fixed + Total variable
Cost per unit = Total life-cycle cost / Total units over full life
Price = Cost per unit + Target profit per unit
SD24: must include ALL phases (introduction through decline) in total unit count.
ABC Cost Driver Rate
Cost driver rate = Total cost of activity pool / Total cost driver units
Cost per unit = Σ(cost driver rate × driver units per unit)
Number of batches = total units / batch size. Set-ups per product = batches × set-ups per batch.

Section C Strategy

Always in Section C — Performance Measurement (Section E)

One Section C question is always from Section E — Performance Measurement and Control. Expect one of: Balanced Scorecard with calculations and discussion; ROI and RI with transfer pricing analysis; NFP VFM with 3Es; divisional performance comparison. Use the spreadsheet tool. Always calculate BOTH years’ ratios and explain changes in context of the scenario.

Activity-Based Budgeting (ABB) — builds budget from ABC cost drivers and activity demand. Feed-forward control — proactive control using forecasts to prevent deviations before they occur (contrast with feedback/variance analysis which is reactive).

The other Section C question comes from Decision-Making (C) and/or Budgeting (D). Common combinations: relevant costing shutdown decision + discussion; CVP with multi-product + feasibility; planning and operational variances + performance analysis; standard costing flexed budget. May include data analytics or sustainability elements.

PriorityTopicTypical marks and formatKey watch-out
★★★CVP Analysis (C2)Section C or B — C/S ratio, BEP, MOS, multi-product, target profit discussionUse weighted avg C/S ratio for multi-product; express MOS as %; feasibility requires scenario discussion
★★★Performance Measurement (E1)Section C — calculate FPIs/NFPIs, BSC, interpret changesCalculate ratios for BOTH years; interpret in context of scenario; explain why a balanced mix matters
★★★Throughput Accounting (B4)Section B case — TPAR, bottleneck, ranking, TOCBottleneck = lowest max output (capacity/time); rank by throughput per bottleneck hr; factory cost excludes advertising
★★★Relevant Costing (C1)Section B or C — materials, machines, shutdown, make-or-buyMachine relevant cost = highest alternative use; materials: check whether in stock, replaceable, alternative use
★★Optimal Pricing (C4)Section A or B — MR=MC, demand function, pricing strategiesb = ΔP/ΔQ; MR = a−2bQ; set MR=MC (not set P=MC)
★★Target Costing (B2)Section A or B — target cost, cost gap, servicesTarget profit = higher of two methods; services heterogeneous; feed-forward control
★★ROI and RI (E2)Section B or C — divisional performance, transfer pricingRI: pre-tax profit; divisional (not group) cost of capital; min TP = variable cost + opportunity cost
★★Sales Variances (D5/D6)Section A or B — mix, quantity, planning, operationalSales qty variance uses standard mix of actual total quantity; planning/operational split requires revised budget
★★NFP Performance (E3)Section C (E question) — 3Es, VFM, multiple objectivesDefinitions must be complete; application to scenario required; explain WHY balanced mix important
★★ABC (B1)Section B or A — cost drivers, rates, cost per unitTotal batches = units/batch size; multiply set-ups per batch by number of batches for total set-ups

Final 24 Hours — Cram View

If you only have time for the ★★★ topics, focus here:

  • CVP Analysis (C2): weighted average C/S ratio, BEP, MOS, target profit.
  • Performance Measurement (E1): FPIs/NFPIs both years, Balanced Scorecard, Building Block model.
  • Throughput Accounting (B4): bottleneck = lowest max output; rank by throughput per bottleneck hour.
  • Relevant Costing (C1): machine relevant cost = highest alternative use; check material status (in stock/replaceable).

Then, if time remains:

  • Re-read the Top 20 Traps list once more
  • Skim the Key Formula Reference for anything you’re still unsure of
  • Check the Command Word Glossary so you don’t lose marks misreading a requirement

Study Route

  • Start with Section B topics (B1–B4) — ABC, target costing, life-cycle costing, throughput accounting. Consistently tested in Section B cases with full 5-question scenarios.
  • Master Section C core topics — CVP (C2), Relevant costing (C1), Pricing (C4), Performance measurement (E1/E2/E3). Two 20-mark questions demand depth and application.
  • Build variance calculation fluency — D2 (learning curves, time series), D4 (mix/yield), D5 (mix/quantity), D6 (planning/operational). High calculation content; errors cascade.
  • Don’t neglect Section A breadth — big data pyramid (A3), budgetary systems (D1), risk and uncertainty (C6), behavioural aspects (D7). Small topics tested as standalone OT questions.
  • Exam technique — read rounding instructions carefully (D25: 3 d.p.; MJ25: 1 d.p.). Use spreadsheet functionality in Section C. Show workings even for partial credit. Always apply discussion to the scenario, not generically.

Quick Reference Cards

Final 48-hour condensed reference · All key formulas, variances, and exam traps in one scan

Costing Methods
ABC — cost driver rate= Total activity cost / Total cost driver units
Target cost= Target price − Target profit marginCost gap = Current cost − Target cost → must be closed
Throughput contribution= Sales revenue − Direct material cost
TPAR= Throughput per bottleneck hour / Operating cost per bottleneck hourTPAR > 1 = accept; < 1 = review/reject
ABC: assign costs to activities → cost pools → products using drivers. Not the same as absorption costing.
Throughput: only variable cost = materials. All labour and overhead = fixed operating costs.
Relevant Costs & Decision-making
Include: future, incremental, cash flows — opportunity costs
Exclude: sunk costs, committed costs, apportioned overheads, non-cash (depreciation)
Material in use (relevant cost)= Replacement cost (if will be replaced) or NRV (if surplus) or opportunity cost
Labour (relevant cost)= Idle/spare capacity (workers paid anyway): £0. Overtime: premium only. Diverted from other work: basic wage + contribution foregone
Make vs BuyBuy if external price < marginal cost of making (+ opportunity cost if capacity constrained)
Apportioned head office costs are never relevant — they exist regardless of the decision
Contribution foregone = opportunity cost of using a resource that has another use
CVP Analysis
Contribution= Sales − Variable costs
BEP (units)= Fixed costs / Contribution per unit
BEP (revenue)= Fixed costs / C/S ratio
C/S ratio= Contribution / Sales × 100%
Margin of safety= (Budgeted sales − BEP) / Budgeted sales × 100%
Target profit volume= (Fixed costs + Target profit) / Contribution per unit
C/S ratio is constant per unit; use for revenue-based BEP and mixed CVP problems
Limiting Factors & Linear Programming
Ranking (single constraint)= Contribution per unit of scarce resourceRank highest to lowest; produce in order until resource exhausted
Shadow price= Increase in contribution per additional unit of the scarce resource
Shadow price = how much to pay ABOVE normal price for extra units of the scarce resource
LP: identify constraints → plot lines → shade feasible region → test corner points for maximum contribution
Iso-contribution line: parallel lines; move away from origin to find optimum corner point
Slack= Unused resource at optimum (non-binding constraint)
Standard Costing — Core Variances
Material price variance= (SP − AP) × AQ purchased
Material usage variance= (SQ for actual output − AQ used) × SP
Labour rate variance= (SR − AR) × AH worked
Labour efficiency variance= (SH for actual output − AH worked) × SR
Fixed OH expenditure= Budgeted FOH − Actual FOH
Fixed OH volume= (Actual output − Budgeted output) × Std FOH rate
Sales price variance = (AP − SP) × Actual quantity sold
Sales volume variance = (Actual units − Budget units) × Standard contribution (marginal) or profit (absorption)
Mix, Yield & Sales Mix Variances
WASP (material)= Total std cost of std mix / Total std qty in std mix
Material mix variance (per material)= (Std proportion of actual total − Actual qty) × SP
Yield variance= (Actual yield − Std yield from actual input) × WASP
WASC (sales)= Total budgeted contribution / Total budgeted units
Sales mix variance (per product)= (Actual units − Std mix of actual total) × Std contribution
Sales quantity variance (total)= (Total actual − Total budget) × WASC
Mix + Yield = Usage variance (check). Mix + Quantity = Volume variance (check).
Yield uses WASP not individual prices. Quantity uses WASC not individual contributions.
Planning & Operational Variances
Planning variance= (Original std − Revised std) × Actual qty/hrsUncontrollable — external environment or standard error
Operational variance= (Revised std − Actual) × Actual qty/hrsControllable — basis for manager performance appraisal
Check: Planning + Operational = Total variance
Revised (ex-post) standard should be set independently, using objective external data — not by the manager being assessed
Adverse planning variance = original standard was too optimistic
ROI, RI & Transfer Pricing
ROI= Operating profit / Capital employed × 100%
Residual Income (RI)= Pre-tax operating profit − (CE × Divisional CoC)
RI advantage: better goal congruence — accept any project with RI > 0
ROI disadvantage: rejects positive-NPV projects that dilute divisional ROI
TP — spare capacityMinimum TP = Variable cost (no opportunity cost)
TP — full capacityMinimum TP = Market price = VC + (MP − VC)
Group profit is unaffected by the transfer price itself — it only redistributes profit between the two divisions.
Performance Measurement
BSC 4 perspectives: Financial → Customer → Internal Process → Learning & Growth
Strategy map direction: L&G → Process → Customer → Financial (cause → effect)
Building Block (Fitzgerald & Moon) — for services:
ResultsCompetitiveness + Financial
DeterminantsQuality, Flexibility, Resource utilisation, Innovation
StandardsOwnership, Achievability, Equity
RewardsClarity, Motivation, Controllability
NFP — Three EsEconomy (input cost quality); Efficiency (output/input); Effectiveness (outcomes vs objectives)
Economy = appropriate quality at minimum cost — quality qualifier required (MJ25)

C5 — Make-or-Buy & Short-Term Decisions

Make-or-Buy (No Limiting Factor)

Buy if: relevant cost of buying < relevant cost of making

Relevant cost of making = variable costs + avoidable fixed costs only (NOT apportioned overhead)

Make-or-Buy (Limiting Factor)

Benefit from buying = relevant cost of making − buy-in price

Calculate benefit per unit of limiting factor released

Buy whichever gives highest benefit per unit of scarce resource

Shut Down Decision

Keep if: contribution lost > avoidable fixed cost savings

Close if: avoidable fixed cost savings > contribution lost

⚠ Accounting loss ≠ close. An accounting loss product may still make positive contribution.

Further Processing of Joint Products

Joint costs are SUNK — always irrelevant

Process further if: incremental revenue > incremental cost of further processing

Only compare: additional revenue vs additional cost of further processing

C6 — Risk and Uncertainty in Decision-Making

Expected Value

EV = Σ (probability × outcome)

Choose highest EV (maximising) or lowest EV (minimising cost)

Limitation: only meaningful for repeated decisions — a single one-off outcome will not equal the EV

Maximax / Maximin / Minimax Regret

Maximax (optimist): choose highest possible payoff — ignores downside

Maximin (pessimist): choose option with best worst-case outcome

Minimax Regret: (1) Build regret table: best payoff in each state − each option’s payoff. (2) Find max regret per option. (3) Choose option with lowest maximum regret.

Value of Perfect Information (VPI)

VPI = EV with perfect info − EV without

EV with perfect info: in each state, assume optimal decision is made → weight by probability

VPI = maximum to pay for any market research / information system

Decision Trees — Roll-Back Method

Squares = decision points; Circles = chance nodes

Roll back RIGHT to LEFT: at circles, calculate EV; at squares, choose best branch (cross off others)

Always show workings at every node

Sensitivity Analysis

Sensitivity % = NPV ÷ PV of relevant cash flow × 100

Lower % = more sensitive = more critical assumption

Limitation: one variable at a time; no probabilities given

D1 — Additional Budgeting Topics

Activity-Based Budgeting (ABB)

Build budget from ABC activities and cost drivers — not historical spending

Advantages: transparent link between output and cost; highlights inefficient activities

Disadvantages: complex; requires existing ABC model

Feed-Forward Control

Proactive control using forecasts to prevent deviations BEFORE they occur

vs Feedback control (variance analysis): reactive — deviation has already occurred

Enabled by rolling budgets and rolling forecasts

Difficulties Changing Budget System (D1i)

Behavioural resistance · Loss of historical comparability · Systems/data infrastructure needed · Staff retraining · Implementation cost and time

Budgeting Under Uncertainty (D1j)

Rolling forecasts · Scenario planning (optimistic/base/pessimistic) · Flexible budgets · Sensitivity analysis · Relative performance targets

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