No guarantee of expected results: Planning is for achieving certain well defined objectives. However, there is no guarantee that the objectives will be achieved within the specific time limit by using planning as a tool. Actual performance may not be as per the expectation due to various reasons. Thus planning has an element of uncertainty. Planning leads to probable results and not the expected results. It gives benefits but may not be exactly as per the expectation. Thus, there is no guarantee that planning will give 100 per cent positive/expected results