CHAPTER 1 SYSTEMS: INTERNATIONAL SPACE STATION PLANNING—A ROADMAP TO GETTING IT ALL DONE 8 execution. This package includes data such as the current state of the ISS (e.g., which computers are configured as primary, safe angles to park the solar arrays in the event of a loss of attitude control [see Chapters 5 and 7, respectively]), questions for the crew from the previous day’s operations, answers to crew questions from the previous day, summaries of key operations for that day, and a list of the key flight control personnel from the various ISS control centers. Any changes to the plans are coordinated with the LRP team and are reflected in updates to the WLPs, STPs, and OSTPs. The overall WLP, STP, and OSTP development timeline is depicted in Figure 3. OOS WLP STP OSTP OSTP Development Plans Execution Plans Ground Onboard Figure 3. Plan Development Flow showing how the OOS feeds into ever-more-detailed products such as the WLP, STP, and OSTP. Figure 4. WLP—list by day of crew operations and other major objectives for 1 week of ISS operations. Activity durations are listed under the crew member who will be performing the activity, but the specific time during the day is not yet defined. All activities are given standard reference codes that the crew and flight controllers understand. For example, EVA-PROC-CONF means the EVA team will have a procedure review conference with the crew on Thursday, though the specific time is not yet scheduled. Russian activities are shown in Cyrillic. As with the OOS, activities and their durations are color coded to indicate to which major category they belong (e.g., vehicle operations, EVA, scientific research). In the WLP phase, the team’s analysis of crew resource allocation focuses more on optimization and measuring progress, and serves as a tool for navigating planning “tradespace.” For example, if an unplanned EVA is required to repair a pump module that has failed, the team must quickly understand how many hours are needed to perform a spacewalk as well as the hours of scientific research, periodic maintenance, or cargo transfer that must be rescheduled to make room for the contingency EVA.