Forecasting, Data and Decision Tools
Index numbers, trends, moving averages, correlation, decision trees, critical paths and the disciplined use of quantitative and qualitative evidence.
How to study A-level Business
Start with the objective and context, build a causal chain across functions, use the numerical and qualitative evidence, then reach a balanced, feasible judgement.
Core concepts
Concept 1
Forecasting extrapolates patterns under assumptions and should be tested against structural change and data quality.
Exam cue: Show each calculation with units, then explain what the result can and cannot decide.
Concept 2
Decision trees make probabilities, payoffs and expected values explicit but do not remove estimation error or risk preferences.
Exam cue: Distinguish a trend or correlation from a demonstrated causal relationship.
Concept 3
Network analysis identifies task sequence, critical activities and float while actual implementation still depends on resources and uncertainty.
Exam cue: Combine quantitative output with strategic fit, ethics, capability and uncertainty.
Risk pitfalls and guardrails
Treating an expected value as the guaranteed outcome.
Guardrail: Do not give a generic advantage or recommendation without explaining why it matters for this organisation, stakeholder and time horizon.
Assuming past trends continue unchanged.
Guardrail: Do not give a generic advantage or recommendation without explaining why it matters for this organisation, stakeholder and time horizon.
Calling every activity on a network equally time-critical.
Guardrail: Do not give a generic advantage or recommendation without explaining why it matters for this organisation, stakeholder and time horizon.
Memory anchors
Index Number
An index expresses a value relative to a base period normally set to 100.
Moving Average
A moving average smooths short-term variation to reveal an underlying trend.
Expected Value
Expected value is the sum of each outcome multiplied by its probability.
Critical Path
The critical path is the longest-duration route through a project network.
Total Float
Total float is the time an activity can slip without delaying project completion.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
Why forecast?
Sales 120, 135, 150. Mean?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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