A plan with only one option, is not a plan. Plans must be flexible and they must have several options or alternatives for them to be effective. Life is messy. Life is unpredictable. It is not "if" something difficult or unexpected will happen but "when" will it happen. A good plan requires several contingencies and alternatives. When we plan our day, we need to have a good plan but a good plan must include the ability to adjust or respond to obstacles thrown in our way. We should have a Plan A, but also a Plan B, C and D waiting in the wings when A doesn't work.