The cornerstone of project documentation of a system should be ______________.

The daily report serves as the cornerstone of project documentation for a system because it provides a comprehensive overview of daily activities, progress, challenges, and decisions made on the job site. This report captures essential information such as labor efforts, materials used, weather conditions, equipment on-site, and any issues that arise. By maintaining accurate and detailed daily reports, project stakeholders can ensure effective communication, track the progress of tasks, and have a historical reference for future decision-making.

Other documentation types, such as time sheets, inspection reports, and shop drawings, play important supporting roles in the overall project documentation process but do not encapsulate the day-to-day operations and immediate project conditions as effectively as the daily report. Time sheets focus specifically on labor hours, inspection reports are limited to quality control checks, and shop drawings detail specific layouts and designs. Thus, while all these documents are valuable, it is the daily report that integrates various aspects of the project, which makes it foundational for robust project documentation.