a) Since cost, time, and quality differ in order of priority according to constraints, a
balance among these must be achieved.
b) Since cost, time, and quality are all independent of each other, there is no need to
achieve a balance among these.
c) Since cost and quality are in direct proportion to each other, management can be
performed with the focus on either one of these.
d) Since cost and time are in inverse proportion to each other, management can be
performed with the focus on either one of these.