Programme Overrun Probability measures the likelihood that a property development project will exceed its planned construction or delivery timeline. It is a key factor in property development finance UK, influencing risk assessments, interest accrual, and cash flow projections for SME developers and lenders. Calculated using historical data, task sequencing, and critical path analysis, this metric allows developers and financiers to identify potential delays, plan contingency budgets, and adjust financing structures accordingly. Understanding programme overrun probability helps optimise scheduling efficiency, mitigate time-related risks, and maintain control over development costs and project milestones within the UK property market.
This sits beneath Time Efficiency, introducing a more specific variant of the measure without changing its core interpretation. It is commonly considered alongside Time Overrun Risk, as both are closely related measures used to assess similar aspects of performance or risk. In funding terms, Programme Overrun Probability is most commonly encountered in connection with Phantom Equity (Profit Share Only) within the property development capital stack.
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