How does each factor affect the scope of the Project?
In an ideal scenario, the project manager has unlimited time and resources (Cost) to complete the project. He/she will be able to deliver a very high quality project under such circumstances. However in the real world of project quality management, this is rarely the case and at least one of these three factors is fixed for any project.
If any one factor is fixed, it causes strain on the other factors. i.e.
If the “Time" is fixed, then the quality of the project decreases and the cost increases. If however, with time being fixed, the quality of the project has to be increased, then the cost increases exponentially. Hence in order to reduce cost, some of the additional functionality of the project is eliminated.
If the “Cost" is fixed in terms of budget and resources, then a higher quality project takes more time, while lesser time means the quality of the project in terms of functionality will be reduced.
If the “Quality" of the project is fixed, then as the Time decreases, the cost of the project (money and people) required to complete the project successfullly increases and vice versa.