*5.2. Application and Illustration*

The application of the proposed 4D planning method is structured in four phases as follows:

5.2.1. Phase 1: To Express the 4D Objectives in an Initial BIM Specification Document

Table 1 proposes a reformulation of the 4D requirements so that they can be understood without ambiguity and therefore allow the project teams to propose relevant solutions to answer them.

**Table 1.** Phase 1: Expression of 4D objectives in the BIM specification document.

