Performance measurement: constitutes the last but not the less important stage of the marketing plan, since we can achieve only what we can measure. In order to measure the performances achieved through the marketing plan, we need to constantly monitor each previous stage of the plan.
What was the outcome? As much as 90% businesses started by entrepreneurs and small business went busted or failed within a year. I experienced one of the many busts few years ago (with my cafe business) because i don't really have a proper and "the few solid sheets" called a marketing plan.