Chapter 6: Local Road Construction Management 183 c. Contract/Work Variations i. At any given time during construction implementation phase, the Engineer may issue a variation through the recommendation of the Resident Engineer. Please note that this variation to the works is agreed to be implemented by the Owner. Variation may include changes in quantities of any item of work included in the Contract; it may be any additional work necessary to complete the project or may be an omission of any portion of the works; ii. The Engineer through the Resident Engineer will issue instruction to the iii. Contractor necessary for changes in some part of the works; iii. If such instruction will entail additional cost or time, the Contractor may submit his proposal to the Engineer; iv. If the Engineer and the Contractor agreed on the proposal, then the contractor may proceed with the work; v. The Contractor may submit to the Engineer a variation claims for a particular works he has performed whether it may be pursuant to the Engineer’s instruction or in accordance with the contract documents. It is the responsibility of the Engineer to determine whether such claim of the Contractor is valid under the terms and conditions stipulated in the contract. However, no variation claim shall be evaluated by the Resident Engineer unless the variation works is approved by the Engineer. However, in some cases variation to the works may be claimed by the Contractor even without any instructions from the Engineer to proceed with the works, if and only if the Contractor may prove that the works done is deemed necessary for the satisfactory completion of the works which is not stated anywhere in the contract terms, contract drawings, specifications and any other contract documents; and vi. The Engineer in his valuation of any variation claim by the Contractor may refer to the contract documents such as the scope of works, specifications, drawings, BOQ etc.