This report presents the results from a study on how specific cases of defence materiel acquisition can be categorized and how key performance indicators can be used in the defence materiel acquisition process. The findings and the recommendations suggest a methodology for categorizing and for using key performance indicators. The study was performed by a group of researchers at FOI, initiated by Samverkansforum, with the Swedish Armed Forces as the formal customer. The study was carried out as three interdependent studies; a pre-study, an analysis of category management framework, and pilots on how key performance indicators can be used in the defence materiel acquisition process. The findings were presented to representatives from the Swedish Armed Forces and FMV as a way of anchoring the recommendations. Based on the results of the study, we recommend the following: (1) To implement the category management framework. The implementation should be a joint decision by the two authorities and target the entire defence materiel acquisition process. Moreover, the category management needs to comprise all cases of materiel acquisition. (2) To implement key performance indicators in the defence materiel acquisition process. Our advice to the Swedish Armed Forces and FMV is to implement key performance indicators jointly. This implementation should be performed by the following three steps; 1) in the near future initiate and perform an in-depth pilot in order the improve the methodology, 2) to implement key performance indicators for cases of materiel acquisitions in early phases, 3) to apply key performance indicators to all materiel objects in a concept phase until a decided TTEM.