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Scottish Transport Analysis Guide (Scot- TAG)
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13.3 optimism bias
13.3 Optimism Bias
Publication Date:
27 May 2008
The following sub-sections provide detailed guidance on the application of optimism bias (OB).
13.3.1 General
13.3.2 Relationship Between Optimism Bias and Risk Assessment
13.3.3 Applying Optimism Bias Factors
13.3.3.1 Step 1: Determining the Nature of the Project
13.3.3.2 Step 2: Identifying the Stage of Scheme Development
13.3.3.3 Step 3: Applying the Recommended Optimism Bias Factor
13.3.3.4 Step 4: Provide Sensitivity Analysis Around the Central Estimate
13.3.4 Optimism Bias and Rail Projects
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