Next Level Critical Path Management
The critical path is the longest sequence of tasks in a project. Delays on the critical path will also delay project completion. To keep your project schedule on track, it’s important to keep an eye on near-critical paths and other path changes (and communicate them to stakeholders).
- Near-critical paths. Let’s say a project’s critical path is 42 days. But the duration of another path is 44 days. With only 2 days of leeway (that is, slack) on this second path, even a short delay could change which path is critical. That’s why the second path is considered a near-critical path. Managing near-critical paths is important because they can become the critical path with a minor delay. Tell management about any near-critical paths, because scope, priority, or other changes that they might want to make could impact the project more than they realize.
- Path changes due to risk responses. Risk plans identify risks and the actions to take to respond if a risk comes to fruition. These actions could affect pathways through the schedule, changing the critical path duration, switching to a new critical path, or creating a new near-critical path. Communicating these potential changes to management demonstrates your control of the project and attention regarding the project’s deadlines. For example, if a product purchased from a vendor could be delayed, the risk mitigation actions might be negotiating and purchasing a product from an alternate vendor. Negotiating, procuring, receiving, and testing the alternate product could add tasks to your plan that could result in a new critical path or near-critical paths. Those tasks could also eat into schedule contingency, which should also be communicated to management.
- Path changes from unexpected resource changes. Losing project resources is a common risk. Significant changes will occur if the project has to absorb resource changes beyond what’s addressed in the risk plan. Resource changes can affect the schedule in many ways. You need to analyze potential changes to critical and near-critical paths in enough detail so that management can make informed decisions about the resource changes and their impact. The schedule needs detail, including who is assigned to each task, task work and duration estimates, and the work and duration changes that would occur if a less-skilled person takes over a task.
- Path changes from changes to scope, business direction, or strategy. Changes to the project scope, business direction, or strategies can seem straightforward, but they can complicate project management. A colleague was managing a project that had to accommodate two new business processes considered crucial to the growth of the sponsoring business. On the surface, validating the new processes in the project’s new computer system deliverables seemed straightforward. In reality, the validation effort required additional technical and business skills, which added 3 weeks to the critical path and created two new near-critical paths. These changes meant project management expanded to scrutinizing three times as many tasks (counting the critical and near-critical path tasks) as before.
Take a moment now to check whether your current project schedule has near-critical paths. If so, which additional tasks do you need to watch and what steps do you need to take?
For more about project schedules, check out my Project Management Foundations: Schedules course.
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