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Tier 2--Weighted-Matrix Delivery Decision Approach 77 plement the archival record of the project delivery decision. The Project Delivery Decision Report will serve to communicate the decision to interested stakeholders and to justify the decision if issues arise years later, after the project is completed. The five steps of the Tier 2 approach are discussed in more detail below. In this report, to better illustrate how the Tier 2 approach works, the selection of a delivery method for an example proj- ect is followed through the first three steps of the Tier 2 analysis. Following the description of Steps 1, 2, and 3 in the Tier 2 approach is an illustration of how each step was handled in the delivery selection process for the example project. Step 1. Define Selection Factors As stated in Step 1 of the Tier 1 approach, understanding and communicating a concise set of project goals is perhaps the most important element in selecting an appropriate project delivery method. The definition of project goals is a key success factor not only in the project delivery deci- sion, but also in the development of procurement documents and the administration of a project. It is the project performance goals (e.g., time, cost, quality, maintainability, and sustainability) that typically drive the project delivery decision. The first step in the Tier 2 approach requires airports to combine the project goals and pertinent issues into a set of selection factors for use in the weighted-decision matrix. This step requires a review and filtering of the project goals and pertinent issues for use as selection factors. Figure 5-2 depicts this process. To create the goal-based selection factors, airports should review the project goals that were established in Tier 1. The Tier 1 review of the delivery method advantages and disadvantages may have revealed overlaps or gaps in the originally established project goals. While the original proj- ect goals should not change, these overlaps and gaps will need to be removed for the development of the Tier 2 selection factors. Step 1 in the Tier 2 approach allows and encourages editing of these goals as they are rewritten into selection factors. In developing selection factors from the project goals, airports should consider the following questions: Are there significant overlaps in the project goal statements that can be revised to make them more independent? Project Goals Pertinent Issues Develop Issue-Based Develop Goal-Based Selection Factors Selection Factors Choose critical Remove overlaps issues Fill in gaps Remove overlaps TIER 2 SELECTION FACTORS Comprehensive Non-overlapping Concise Figure 5-2. Tier 2 selection factor development.