# 7 Checklists The input and output entries for the reference points are described in a checklist in table format. The checklist acts as a tool to facilitate reference point planning and implementation in design projects. Input and output entries can be concretised, expanded or deleted if necessary in the checklist to meet specific project requirements. The structure of the checklist is as follows: Process phases with associated reference points Content clusters with associated entries and target progress status The phases or milestones in the MEPRO process model (refer to Chapter 5.2) are depicted horizontally in the checklist. The reference points are associated with the phases in accordance with the MEPRO process model (refer to Figure 5) and are depicted horizontally in chronological order. Content entries are to be interpreted as process deliverables (information, document, product), which are either required at a particular reference point (input entry) or are generated within the framework of a reference point (output entry). A content item can be addressed in more than one reference point, thus occupying a continuous line in the table. An entry can have a different status at two reference points (S = started, A = agreed, C = closed). Status values of S and C can only be assigned once, whereas status A can be assigned more than once. The various entries are arranged vertically. To provide structure to content entries, so-called content clusters are defined. Each entry is associated with exactly one content cluster. A distinction is made between the following content clusters: "product requirements", "product solution - implementation and manufacturing process", "test, trials and simulation of prototype, product and manufacturing process", "configuration and change management", quality management - product, manufacturing process and design process" and "project management".