Case for change, theory of change and BAU: the problem, the expected mechanism of change and the do-nothing counterfactual.
Objectives and critical success factors: the outcomes sought and the knock-out criteria.
Longlist to shortlist: options opened up before a documented narrowing.
Five Case Model: strategic, economic, commercial, financial and management cases.
MCDA: anchored scoring scale, independent criteria and no double counting.
Swing weighting: weight reflects the gap between the worst and best level, not the criterion's abstract importance.
Veto and gate: an unviable option cannot re-enter the ranking on the strength of a good average score.
Sensitivity analysis and switching value: the change in assumption or weight that reverses the ranking.
Optimism bias, risk cost and contingency: historical bias, specific risk and residual provision are kept distinct.
Decision rights and RACI: sponsor, decision authority, accountable owner, contributors and control.
Benefits map: outcome, benefit, indicator, baseline, owner and verification date.
Stage gates, RAID log and decision log: risks, assumptions, issues, dependencies and versioned decisions.