During the start of a project organisations make estimation on the expected amount of work and the corresponding project duration, the lead time. To make these estimations with a low uncertainty is important because a false estimation could result in cost overruns and project delay. This paper proposes an estimation and planning maturity framework where organisation can asses which methods can be used to ensure the estimation and planning are performed to the lowest possible uncertainty. The framework was implemented at a case study organisation, it was found that selecting the correct estimation and planning methods can result in a lead time estimation with a low uncertainty.