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Differentiate site order book and measurement book

Short answer

A site order book records written instructions and orders from the engineer to the contractor, while a measurement book records measured quantities of completed work. The order book is evidence of instructions, delays and variations; the measurement book is the basis for bills, payment and audit.

Explain and differentiate between site order book and measurement book.

A site order book records the written instructions and orders given by the engineer to the contractor at site. A measurement book records the measured quantities of completed work.

PointSite order bookMeasurement book
PurposeWritten orders, instructions, remarksMeasurements of work done
ContentsInstructions, defects, changes, repliesDimensions, quantities, calculations, location
Used forControl of quality, time and variationsPreparation of bills and payment
Written byEngineer; contractor writes repliesEngineer, overseer or measuring person
Signed byEngineer and contractor's representativeMeasuring person, contractor, checking officer
Value as recordEvidence of instructions, extension of time, variationsEvidence of quantity of work for payment and audit
Kept atSite office, open to the contractor and inspecting officersWith the engineer, in safe custody

✓ Answer checked by Claude Opus 5.5 (high effort)

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