GE's planning grid approach

a.

doesn't work, because given the subjective evaluations involved, different managers usually come to different conclusions.

b.

is really the same thing as the total profit approach.

c.

overemphasizes short-term profitability.

d.

is superficial because it considers only size and expected market share and ignores other possibly important factors.

e.

could be adapted easily by another firm with different objectives.