Task duration in Microsoft Project

To be able to create a project schedule you need to assign a duration to each of the tasks, tell Microsoft Project how the tasks are inter-related or dependent upon one another and assign resources to complete the tasks. Once duration have been entered, Project has sufficient information to be able to calculate a critical path and determine the amount of slack in the tasks.

Everything You Need to Know About Duration in MS Project

How Microsoft Project Calculates Task Duration

Task Duration in Microsoft Project

Once tasks have been entered (or as they are being entered) you can specify the appropriate duration details for each task. Unless specified otherwise, the default duration as set in the Options dialog box is used. This duration is in days, and 1 unit is provided. This is why 1 day has appeared on the tasks that you have entered.

Estimated Duration in Microsoft Project

Microsoft Project allows you to enter estimated duration if you wish. Estimated duration appear with a question mark at the end of them. The default duration appears with a question mark because the duration has been entered by Microsoft Project and requires you to enter the appropriate value when you are ready. 

What is Estimated Duration in Microsoft Project ?

Abbreviations of Task Duration option

You can type the duration in minutes, days, hours, weeks, or months, and you can use a variety of abbreviations for these. For example, you can express a day as d, dy, or day, and a week as w, wk, or week. Minutes are normally entered as m, while months are entered as mo.
How to change work hours without changing duration in MS Project

Units used for Task Duration in MS Project

Project internally converts the duration to hourly units as defined by the duration of a day and a week in the Options dialog box. If the Options dialog box states that a day comprises of 8 hours, and the base calendar says that the day starts at 7:30 am and finishes at 4:00 pm with a half hour lunch break, and you enter a task with a 10 hour duration, the task will be scheduled according to regular working hours. This task will be scheduled to start at 7:30 am and finish at 9:30 am the following day – 8 hours on the first day (7:30 – 4:00), and 2 hours on the second day (7:30 – 9:30).

Microsoft Project hours instead of days

What is Elapsed Duration in Microsoft Project ?

You can also specify elapsed duration where the passing of a certain amount of time is important. Elapsed duration is based on 24 hours. For example, waiting for paint to dry is best measured as elapsed time, rather than the other type of duration, which is based on the hours in a working day.
If you are scheduling down to the hour it helps to actually display hours in the start and end time of project tasks. The way dates and time are displayed can be changed in the Options dialog box. The Options dialog box is accessed from the Backstage (by clicking on the File tab) and clicking on [Options]. The date and time display settings are controlled using the Date Format option under Project View on the General tab of the Options dialog box.
What is Elapsed Duration in Microsoft Project ?

How to Enter Task Duration in Microsoft Project ?

Once tasks have been entered (or as they are being entered) you can enter the appropriate duration details for each task. Duration can also be entered with a ? suffix. This indicates that the duration is a rough estimate. You can later change the duration to confirm the estimate. 
How to Enter Task Duration in Microsoft Project ?

How to Enter Task Duration in Microsoft Project ?

How to Enter Task Duration in Microsoft Project ?

How to change the default task duration unit in Microsoft Project

Leave a Reply

Your email address will not be published.