In this video, Jim describes the final step of assigning dates to each of the work activities based on their start and finish days, and discusses the importance of differentiating between working days and calendar days.
- Our network model is done. All of our work activities are defined. Our network shows the relationships between all of these activities. Which ones have to finish before the next ones start, and we know how long each activity is going to take. We also know which items are on the critical path and which ones have some float. Now it's time to assign some dates to all of these activities. It's one thing to say that an activity needs to start on day 45 of the project, but what I really need to know is what date that activity starts.
So far when we've talked about durations in terms of days, we're talking about working days. We assign durations in terms of working days to each activity. Now, you just need to define what a working day is and start plotting them out on the calendar. It is simple, but it's tedious, and it's easy to make a mistake when you do it by hand. Instead, with scheduling software, we follow the same procedures. Entering all the information that we've discussed into the software, then you can define in the software what a working day is.
That's commonly Monday through Friday, excluding national holidays. But I've been on plenty of projects where existing or adjacent facilities or operations make the working days Monday through Thursday with no work permitted on Friday, Saturday, or Sunday. Scheduling software will typically let you define this any way you want, and you can change the parameters to see how the overall completion date is affected. All that's left to do after you've defined what a working day is, is to input the actual start date, and you have a working schedule.
Let's see what this looks like.
This course identifies the steps needed to develop a proper plan, and demonstrates how that plan is transformed into a construction schedule. Throughout the course, instructor Jim Rogers shares examples of his own successes and failures in the areas of construction planning and scheduling, so as to lend real-world context to the concepts he covers.
- Types of schedules
- Planning versus scheduling
- Work breakdown structure
- Developing a schedule
- Creating a network model
- Assigning durations, costs, and resources
- Identifying the critical path
- Letting the software do the calculations
- Checking and updating the schedule
- Scheduling's impact on productivity