Sub-Clause 13 Variations toolkit for subcontractors on FIDIC 1999 and 2017 Rainbow Suite projects. Variations Register with 4-state lifecycle tracking, Subcontractor Value Engineering proposals (Sub-Clause 13.2), Cost Build-Up worksheet implementing the 13.3 / 12.3 valuation cascade, Provisional Sums register, Daywork sheet, and a Particular Conditions cheatsheet for the 11 most commonly amended Sub-Clause 13 items.
