Critical documents for building a software product include:

- Objectives: This document outlines the specific needs to be met, along with goals, constraints, and priorities.
- Specifications: This document includes both the manual and performance specifications. It is typically one of the first documents generated and one of the last to be finalized.
- Schedule
- Budget: This document not only serves as a constraint but also acts as a tool to drive decision-making and the creation and management of policies.
- Organization Chart: This document defines the hierarchical structure of the project team, highlighting the roles and responsibilities of each member.
- Space Allocations: This document determines how physical or virtual spaces will be allocated for different project activities and resources.
- Estimate, forecast, prices.