Would you like to inspect the original subtitles? These are the user uploaded subtitles that are being translated: 1 1 00:00:01,429 --> 00:00:03,524 Now let's look at the practical essentials 2 2 00:00:03,524 --> 00:00:07,530 of preparation of the project schedule. 3 3 00:00:07,530 --> 00:00:09,705 Now that we have all the deliverables, 4 4 00:00:09,705 --> 00:00:12,258 a precedence diagram showing what order they come together 5 5 00:00:12,258 --> 00:00:14,506 and estimates of how long they will take, 6 6 00:00:14,506 --> 00:00:17,010 we can calculate the overall project schedule 7 7 00:00:17,010 --> 00:00:20,093 and the critical path that drives it. 8 8 00:00:20,943 --> 00:00:23,224 The Gantt chart maps the precedence diagram 9 9 00:00:23,224 --> 00:00:26,325 onto the calendar, and is the formal baseline 10 10 00:00:26,325 --> 00:00:28,075 for the project time. 11 11 00:00:29,291 --> 00:00:31,070 For a project of any complexity, 12 12 00:00:31,070 --> 00:00:33,652 we need the help of a Gantt chart application, 13 13 00:00:33,652 --> 00:00:35,868 for example, Microsoft Project, 14 14 00:00:35,868 --> 00:00:38,413 Primavera, or ProjectLibre, 15 15 00:00:38,413 --> 00:00:41,858 to do all the date calculations. 16 16 00:00:41,858 --> 00:00:45,528 We start by entering the project start date, 17 17 00:00:45,528 --> 00:00:47,809 enter the number of hours in the work day 18 18 00:00:47,809 --> 00:00:49,450 individually by resource if they differ 19 19 00:00:49,450 --> 00:00:52,446 for different people or roles, 20 20 00:00:52,446 --> 00:00:56,417 enter the deliverables, their durations from the estimates, 21 21 00:00:56,417 --> 00:01:00,610 and the links between them from the precedence diagram. 22 22 00:01:00,610 --> 00:01:03,657 The tool skips weekends and any specified holidays 23 23 00:01:03,657 --> 00:01:07,472 and lays the deliverables across the calendar. 24 24 00:01:07,472 --> 00:01:09,969 And the tool calculates the critical path 25 25 00:01:09,969 --> 00:01:12,802 that drives the schedule end date. 26 26 00:01:14,182 --> 00:01:17,493 Creating the precedence diagram first and then entering 27 27 00:01:17,493 --> 00:01:19,250 the structure into the Gantt tool 28 28 00:01:19,250 --> 00:01:21,415 makes building a schedule easy 29 29 00:01:21,415 --> 00:01:25,333 and provides several other advantages. 30 30 00:01:25,333 --> 00:01:26,991 The top-level schedule includes 31 31 00:01:26,991 --> 00:01:29,824 only deliverables, not activities. 32 32 00:01:30,879 --> 00:01:33,453 The number of precedence links is minimized 33 33 00:01:33,453 --> 00:01:36,115 to just what is needed. 34 34 00:01:36,115 --> 00:01:39,560 So the Gantt charts ends up being as simple as possible, 35 35 00:01:39,560 --> 00:01:42,677 easily maintainable, and actually useful 36 36 00:01:42,677 --> 00:01:47,094 throughout the project, which is not always the case. 37 37 00:01:47,094 --> 00:01:50,179 Far too often, we dive into the Gantt software 38 38 00:01:50,179 --> 00:01:53,324 without having prepared a precedence diagram first 39 39 00:01:53,324 --> 00:01:55,726 and end up with a schedule that is too complex 40 40 00:01:55,726 --> 00:01:57,763 and hard to maintain. 41 41 00:01:57,763 --> 00:01:59,219 Whenever you make a small update, 42 42 00:01:59,219 --> 00:02:02,131 the changes cascade and are hard to understand. 43 43 00:02:02,131 --> 00:02:05,182 This common complexity problem is solved 44 44 00:02:05,182 --> 00:02:08,765 by developing the precedence diagram first. 45 45 00:02:10,117 --> 00:02:13,608 Also, avoid the built in precedence diagram function 46 46 00:02:13,608 --> 00:02:17,175 in the Gantt software since it redraws the diagram 47 47 00:02:17,175 --> 00:02:19,234 after every update. 48 48 00:02:19,234 --> 00:02:21,658 And instead, maintain the precedence diagram 49 49 00:02:21,658 --> 00:02:24,560 in a separate drawing tool. 50 50 00:02:24,560 --> 00:02:26,853 Usually, you would never keep data in two places 51 51 00:02:26,853 --> 00:02:28,216 if you could avoid it. 52 52 00:02:28,216 --> 00:02:31,002 However, this is an important exception 53 53 00:02:31,002 --> 00:02:33,433 since the need to make updates in two tools 54 54 00:02:33,433 --> 00:02:36,904 is more than outweighed by the complete control you retain 55 55 00:02:36,904 --> 00:02:39,386 over the precedence diagram layout. 56 56 00:02:39,386 --> 00:02:42,463 And the precedence diagram is for human communication, 57 57 00:02:42,463 --> 00:02:45,380 so the layout is really important. 4978