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Decision Diligence
What is decision diligence?
Decision diligence is the independent, structured testing of the judgement behind an important decision before commitment. It clarifies the decision actually being made, then examines the assumptions, evidence, alternatives, risks and strongest opposing case behind it.
The work can be rigorous.
The judgement can still be wrong.
Organisations can apply considerable rigour to the work surrounding a decision while leaving the combined judgement insufficiently tested.
Legal, financial, commercial and technical advisers commonly test parts of a decision within their respective mandates. Each may do rigorous work. Yet the governing decision — whether to proceed, under what conditions and compared with which alternatives — can still escape independent examination across those inputs.
Decision diligence addresses that gap. It does not repeat specialist analysis. It tests the judgement being made from it.
The governing judgement
What must withstand examination before commitment?
- 01
What decision is actually being made.
- 02
What must be true for the preferred answer to work.
- 03
Which claims are supported by evidence and which remain assumptions.
- 04
Which credible alternatives have been dismissed.
- 05
What the strongest opposing case is.
- 06
Where commitment, incentives or organisational politics may have distorted judgement.
- 07
What conditions should govern proceeding, pausing or stopping.
Decision diligence versus due diligence.
Tests the asset, transaction, facts, risks or specialist workstream.
Tests the judgement that combines those inputs into a decision: whether to proceed, on what basis, under which conditions and compared with which alternatives.
Decision diligence operates across the work of legal, financial, commercial and technical advisers. It does not replace them; it tests the governing decision their work informs.
Before support becomes commitment.
- 01 / Acquisitions and investment
When the investment thesis, price, alternatives and conditions for proceeding need independent challenge before a transaction advances.
- 02 / Technology and AI
When a significant commitment depends on assumptions about value, adoption, capability, control or timing.
- 03 / Major commercial commitments
When the organisation is approaching a consequential agreement that will be expensive or difficult to reverse.
- 04 / Strategic momentum
When a preferred direction has already begun attracting sponsorship, resources or political support.
One governed process.
One accountable judgement.
The output is a clear recommendation that makes the reasoning behind the judgement visible.
It identifies the conditions on which the recommendation depends, the uncertainties that remain unresolved and the residual risks that must be accepted or governed. It also states what would cause the recommendation to change.
Decision diligence does not guarantee the right outcome. It makes a consequential judgement more explicit, more challengeable and more accountable before commitment.
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