DEMITONResearch / Missed claims statistics / No published figure for weather cost as a share of contract value
No published figure for weather cost as a share of contract value
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No published figure for weather cost as a share of contract value: no defensible figure has been published (Ballesteros-Perez, Smith, Lloyd-Papworth & Cooke, 2018; UK; low confidence).
What it is. None - the only share-of-cost figures found are a single residential project and a perception survey.
Sample. UK national weather data and standard building activities; a model with a worked example, not observed projects. Found UK weather extends durations by an average of 21%.
What it is not. Recorded as `none` on purpose. The research pass found only two cost-as-percent figures: 4% on one Sydney apartment project (sponsored content, residential) and 23.8% from a Pakistani perception survey the pass called implausible. Neither is a benchmark, so this register holds no ratio rather than a convenient one. See weather_wet_day_overhead for what IS measured.
Where it came from
- Ballesteros-Perez, Smith, Lloyd-Papworth & Cooke (2018), Incorporating the effect of weather in construction scheduling and management with sine wave curvesabstract · source record
History
- 2026-11-02 subtype 'weather' is now the registers' cause 'penalty_days' (schema 3.0.0, SM070)
- 2026-11-02 subtype moved from 'penalty_days' to 'unclaimed_delay_costs' on SM070 P2 review: the figure measures the cost of weather as a share of contract value (delay money, not time owed), which is what the delay-costs cause covers, not liquidated damages running on time never claimed (the penalty_days cause)