FIDIC / Legal Reference: FIDIC Red Book Clause 13.1
Any alteration to the scope, character, quality, or quantity of the Works instructed by the Engineer under the contract. A Variation may increase or decrease the contractor’s obligations and gives rise to entitlement to adjusted payment and, where programme is affected, an extension of time.
What it means in practice
Under Clause 13.1 of the FIDIC Red Book, Variations may include: changes to quantities, changes to quality or other characteristics, changes to the level or position of any part of the Works, omission of any work, and changes to the sequence or timing. The breadth of this definition means that many actions the employer does not regard as Variations will in fact qualify.
The contractor is obliged to execute Variations instructed by the Engineer without delay. Where the contractor objects, it should comply under protest and simultaneously give notice of claim under Clause 20.
Where disputes arise
Whether a specific instruction falls within the original scope or constitutes a Variation is the most frequently disputed issue in construction final accounts globally. Employers routinely characterise changed requirements as ‘clarifications’ to avoid additional payment.
UAE Context
UAE construction projects frequently generate scope creep through informal design changes, employer-directed design development, and authority-required modifications — many of which qualify as Variations but are not formally instructed as such.
Related terms
e-Basel provides expert quantification and advisory support for disputed Variations in UAE construction and infrastructure projects.
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