Tài liệu học microsoft project 2013

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Every task is important, but only some of them are critical. The critical path is a chain of linked tasks that directly affects the project finish date. If any task on the critical path is late, the whole project is late.

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The critical path is a series of tasks (or sometimes only a single task) that controls the calculated start or finish date of the project. The tasks that 3D the critical path are typically interrelated by task dependencies. There are likely lớn be many such networks of tasks throughout your project plan. When the last task in the critical path is complete, the project is also complete.

Learn more about critical path analysis.

Show the critical path in the Gantt Chart view

The Gantt Chart view will likely be your most used view for showing the critical path.

Choose View > Gantt Chart.

Choose Format, và then select the Critical Tasks check box.

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Tasks on the critical path now have red Gantt bars.

Show the critical path in other task views

You can see the critical path in any task view by highlighting it.

On the View tab, piông chồng a view from the Task Views group.

Staying on the View tab, select Critical from the Highlight list. The critical path shows up in yellow.

To see only the tasks on the critical path, choose the Filter arrow, then piông chồng Critical.

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Tip: In a Network Diagram, tasks on the critical path automatically show up in red. No highlighting is needed.


Video: Show the critical path

This Clip demonstrates how khổng lồ display the critical path in your project, in both the Gantt Chart view và other views.


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View the critical path in a master project

When you’re managing a master project, whole subprojects can be on the critical path. You can see if this is true by telling Project to lớn treat the subprojects lượt thích they are summary tasks.

Choose File > Options.

Choose Schedule, and then scroll down khổng lồ the Calculation options for this project area.

Make sure the Inserted projects are calculated lượt thích summary tasks box is selected.


Tip: This setting does not affect other projects. That is, it only applies khổng lồ the master project you’re working on.


Change what tasks show up on the critical path

Typically, critical tasks have no slaông xã. But you can tell Project khổng lồ include tasks with one or more days of slaông chồng on the critical path so you can see potential problems coming from farther away.

Choose File > Options.

Choose Advanced, và then scroll down to the Calculation options for this project area.

Add a number to lớn the Tasks are critical if slack is less than or equal to box.

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Show multiple critical paths

You can mix up your project schedule to lớn display as many critical paths as you need to lớn keep tabs on your project.

Choose File > Options.

Choose Advanced, scroll down khổng lồ the bottom, and then select Calculate multiple critical paths.

Choose View > Gantt Chart.

Choose Format, và then select Critical tasks.

By mặc định, Project shows only one critical path, the one that affects the project’s finish date. But you might need to lớn see more than one for a couple reasons:

To make sure each subproject of a master project is on time.

To traông xã the progress of different phases or milestones.

To keep an eye on any series of tasks for any reason.

Project management tip: When viewing multiple critical paths, don’t forget that there"s still only one main critical path. If it falls behind schedule, the whole project falls behind schedule. Try these tips to lớn make better use of multiple critical paths in a project once you’ve sầu mix them up.

Try this

Here’s how

Work with multiple projects in one schedule

Choose File > Options.

Choose Schedule, scroll to the bottom, và then select Inserted projects are calculated like summary tasks.

Show only critical tasks

On the Gantt Chart, choose View > Filter > Critical.

To display all tasks again, select No filter in the filter danh sách.

Group critical tasks

On the Gantt Chart, choose View > Group By > Critical.

To display all tasks again, select No Group in the group danh mục.

More about critical path analysis

If you have saved a baseline for your project, the critical path can show you if your project will finish on time và where the danger points are. To get the most out of critical path analysis:

Regularly view the critical path.

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Be aware that the critical path can change from one series of tasks lớn another as you progress through the schedule. The critical path can change as critical tasks are completed or as other series of tasks are delayed.

Closely monitor critical tasks. Any task on the critical path is a critical task. Monitor these tasks regularly lớn see if any of them slip. If a critical task slips, so does your finish date. Save sầu a baseline & use the Tracking Gantt view lớn see slipped tasks.

Protect yourself by viewing tasks that can slip without affecting the critical path. By default, the critical path shows the tasks that cannot slip at all or the project date will slip. You may want khổng lồ view tasks that currently can slip by a day without affecting the critical path, because if they slip by more than a day, they will become critical tasks. Viewing these tasks with slaông xã helps alert you to tasks that are becoming critical while you still have sầu some buffer.


Tip: To change the sensitivity of critical tasks, choose File > Options > Advanced. In the Tasks are critical if slack is less than or equal to menu, enter the number of days under which a task will be considered critical.


When you display the project"s critical path, Project shows only a single, overall critical path, which is the only critical path that controls the project"s finish date. However, you can phối up your plan so that you can also see an additional critical path for each independent network or each series of tasks. You might find this useful for keeping traông chồng of each of the subprojects within a master project, or of each phase or milestone of a project that is divided inlớn multiple phases.

By knowing và tracking the critical path for your project, as well as the resources that are assigned khổng lồ each critical task, you can identify the tasks that can affect your project"s finish date & thus discover whether your project will finish on schedule.

Learn more by reading Manage your project"s critical path.

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These instructions are specific to Project 2007.

The critical path is a series of tasks (or sometimes only a single task) that controls the calculated start or finish date of the project. The tasks that trang điểm the critical path are typically interrelated by task dependencies. There are likely lớn be many such networks of tasks throughout your project plan. When the last task in the critical path is complete, the project is also complete.

Learn more about critical path analysis.

Display the critical path for your project

To verify that adjustments that you make to the project plan don"t adversely affect the critical path, you can reviews the critical path & critical tasks in any of several ways.


To vị this

Follow these steps

Show the critical path in the context of all tasks

On the View thực đơn, choose More Views > Detail Gantt, và then choose Apply.

Show only critical tasks

On the View menu, choose Gantt Chart, & then select Critical in the Filter danh mục

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on the toolbar.

To display all tasks again, select All Tasks in the Filter danh mục on the toolbar.

You can also group all critical tasks together. On the Project thực đơn, point to lớn Group by, and then select Critical.

Show the critical path by using the Gantt Chart Wizard

On the View menu, choose Gantt Chart, và then choose Gantt Chart Wizard

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on the Formatting toolbar. Follow the instructions in the Gantt Chart Wizard khổng lồ format the critical path.

By default, the Gantt chart bars & liên kết lines for critical tasks are displayed in red. This format change overrides any direct formatting changes previously made lớn bar styles or to individual bars.

lưu ý that this formatting of critical tasks applies only khổng lồ the current Gantt Chart view in the current file. To use the same formatting in another file, you can use the Organizer (Tools menu) to copy formatted Gantt Charts to lớn other files.

Show multiple critical paths in a single project

On the Tools thực đơn, choose Options, select the Calculation tab, & then select the Calculate multiple critical paths check box.

Show the overall critical path across multiple projects


Important: This procedure is only effective in a consolidated project. If you don"t have sầu a consolidated project, you must first create one.


On the Tools menu, choose Options, select the Calculation tab, & then select the Inserted projects are calculated like summary tasks check box.

This is a project-màn chơi setting. All projects inserted inlớn this project will be calculated lượt thích summary tasks.

Change which tasks are defined as critical

In Project 2007, a critical task has zero days of slaông xã (float). However, you can change this mặc định value & define a task as critical that has, for example, one or two days of slaông xã.

On the Tools menu, choose Options, and then select the Calculation tab.

In the Tasks are critical if slack is less than or equal to box, enter the maximum amount of slaông chồng, in days, that you want khổng lồ use khổng lồ define critical tasks.

If you want this value lớn be the default value for all of your projects, choose Set as Default.

To learn how lớn find a task"s slaông chồng, see Show slaông chồng in your project.

For instructions about changing a task"s slachồng, see Set lead or lag time (float) between tasks.

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More about critical path analysis

If you have sầu saved a baseline for your project, the critical path can show you if your project will finish on time & where the danger points are. To get the most out of critical path analysis:

Regularly view the critical path. Be aware that the critical path can change from one series of tasks lớn another as you progress through the schedule. The critical path can change as critical tasks are completed or as other series of tasks are delayed.

Closely monitor critical tasks. Any task on the critical path is a critical task. Monitor these tasks regularly to lớn see if any of them slip. If a critical task slips, so does your finish date. Save sầu a baseline & use the Tracking Gantt view khổng lồ see slipped tasks.

Protect yourself by viewing tasks that can slip without affecting the critical path. By mặc định, the critical path shows the tasks that cannot slip at all or the project date will slip. You may want to view tasks that currently can slip by a day without affecting the critical path, because if they slip by more than a day, they will become critical tasks. Viewing these tasks with slachồng helps alert you to tasks that are becoming critical while you still have some buffer.


Tip: To change the sensitivity of critical tasks, on the Tools thực đơn, choose Options. On the Calculation tab, under Tasks are critical if slaông chồng is less than or equal to, specify the number of days under which a task will be considered critical.


When you display the project"s critical path, Project 2007 shows only a single, overall critical path, which is the only critical path that controls the project"s finish date. However, you can set up your plan so that you can also see an additional critical path for each independent network or each series of tasks. You might find this useful for keeping traông xã of each of the subprojects within a master project, or of each phase or milestone of a project that is divided inlớn multiple phases.

By knowing & tracking the critical path for your project, as well as the resources that are assigned khổng lồ each critical task, you can identify the tasks that can affect your project"s finish date và thus discover whether your project will finish on schedule.