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80 A Guidebook for the Evaluation of Project Delivery Methods best choice. However, since the scores will be subjective, owners are encouraged to review the totals to determine whether the values are logical and defensible. The objective of Step 5 is to supplement the Project Delivery Decision Report developed in Tier 1. The Tier 1 report will provide a project description, project goals, delivery methods con- sidered, advantages and disadvantages, delivery method decision, and any relevant appendices. The Tier 2 documentation will add to this documentation of the weighted-matrix decision to supplement 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 deci- sion if issues arise years later as 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 exam- ple project is followed through the first three steps of the Tier 2 analysis. Following the descrip- tion 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 Tier 1, 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 decision, 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 typ- ically drive the project delivery decision. The first step in Tier 2 requires owners to combine the project goals and pertinent issues into a set of selection factors for use in a 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, owners 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- Project Goals Critical 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.