Who is responsible for preparing a detailed specification and execution plan?

The owner is responsible for preparing a detailed specification and execution plan because they are the key stakeholder who defines the project requirements and goals. By establishing the specifications, the owner outlines the expected outcomes, quality standards, and specific materials or methods to be utilized throughout the project. This helps ensure that all parties involved have a clear understanding of the project's objectives and establishes a framework for the contractor and subcontractor to operate within.

A well-defined execution plan from the owner guides the project’s operational aspects, detailing who will be responsible for various tasks, timelines, and the allocation of resources. It is crucial for effective communication and coordination among all involved parties throughout the project lifecycle. This responsibility is fundamental for aligning the goals of the project with the execution phase and helps in mitigating risks associated with construction and installation.