Triple constraint theory working:

Step 1: Work with the client: Whether internal or external, you need to know what your client wants and expects from the project. Project manager should find out if they have a budget, scope, and timeline in mind.

Step 2: Clearly communicate the project scope: For the project to be successful, everybody involved needs to know what the scope is and what their roles and responsibilities are.

Step 3: Set deadlines: It’s important to keep the project on track and on time with expected deadlines.

Step 4: Allocate resources: You need to allocate resources efficiently. Assign the people with the right skillset to the right tasks.

Step 5: Monitor the project and make tradeoffs and adjustments as needed: It’s important to have a well-defined plan for any project. But if you don’t monitor the progress, the plan doesn’t do you much good. Thus proper monitoring of progress is necessary.