On a construction site, what is the primary use of the Site Order Book maintained by field staff and visiting engineers?

Introduction / Context:
Documentation at site is critical for quality, safety, and contractual clarity. The Site Order Book is a statutory or procedural record where inspecting or supervising officers note directions that must be acted on by the contractor or site team.

Given Data / Assumptions:

• The book is regularly presented during site inspections.
• Entries are instructions or observations that require corrective or follow-up action.
• Other records exist for measurements, stores, and labour.

Concept / Approach:
Each record has a distinct purpose: measurement books for quantities, stores ledgers for materials, muster rolls for labour, and the Site Order Book for instructions and compliance tracking. Mixing these can create contractual disputes and poor audit trails. Hence, the Site Order Book specifically captures directions from Executive Engineers or authorised officers.

Step-by-Step Solution:
Identify the function: a directive record from authority to site.Differentiate from measurement and stores documentation.Select the option that matches the instruction-record role.

Verification / Alternative check:
Public works manuals prescribe Site Order Books for instructions; contractors are expected to acknowledge and comply by given dates.

Why Other Options Are Wrong:

• Construction measurements: Recorded in Measurement Book, not Site Order Book.
• Issue of store equipment: Kept in store and inventory registers.
• Names of casual labour: Maintained in muster rolls and wage registers.

Common Pitfalls:
Using the Site Order Book for general notes; failing to close the loop on compliance to instructions.

Final Answer:
Recording instructions by the Executive Engineers