If you stretch any corner of the triangle in Figure 3: Elements of Project Planning: the triangle gets
distorted; similarly any change in the scope of the project has direct effect on (either any or all) of
time, quality and resources of given project. Vice versa, any change in time or cost or resource can
make the project scope altered.
And each corner of this triangle in turn has cost implication e.g. any addition of resource to project
can increase cost of project, any delay in delivery can increase cost of project, any compromise can
quality can have further effect on cost of the project. Hence cost of the project is directly dependent on
project scope & project scope in turn is dependent on project delivery time, quality parameters &
resources assignment.