Design criteria may be specified in a hierarchical manner, and criteria may be allocated
from the top down as shown in Figures 4.6 (page 109) and 4.8 (page 115). Such criteria are
developed through the identification and prioritization of TPMs (Figure 3.17, page 83), the
identification of the required design characteristics developed through the “relationship
matrix” of the HOQ (see Figure 3.18, page 84), and the identification of DDPs. Design
guidelines (standards manuals) may be developed to assist the designer in his/her day–to–
day activities, and checklists may be used to facilitate the design review and evaluation
task. Reference: Sections 2.4 (page 35) and 4.4 (page 112). Also refer to Appendix A.1 on
page 709 for specific checklist items.
12) Referring to Figure 4.1 (page 103), a specification tree is important to: (a) ensure that ALL
13) Referring to Figure 4.2 (page 105), the “metrics” (or TPMs) for each block in the
functional flow block diagram (FFBD) are determined through the requirements allocation
14) Refer to Figure 4.4 (page 107). As part of the functional analysis and allocation process,
trade–off studies were accomplished, which led to determining the requirements (and