This report describes the Work Packages 1 and 2 of the Brain Budget project. The project is sponsored by VINNOVA (Swedish Governmental Agency for Innovation Systems), within the National Aviation Engineering Program (NFFP). There are six Work Packages in total. The project is a joint effort between Saab Aeronautics, Swedish Defence Research Agency (FOI), and Stockholm University. The project focuses in innovative and effective system development for military aircraft in the area of Human Machine Interaction (HMI). The overall objective of the Brain Budget project is to develop quantitative and qualitative Human Machine Interaction (HMI) measures in order to assess the pilot's cockpit HMI to support the establishment of requirement analyses, specification, and closure. The first part in the report (Work Package 1) describes a needs analysis that was conducted in order to describe conditions, prerequisites, and needs from both the pilot (end-user) and system developer perspectives of system development. The result gives a concurrent view of how HMI aspects are addressed today. There is a lack of systematic recurring HMI-evaluations and testing during system development. Several interrelated issues are the reason for this situation and this needs to be further considered during system development and design concerning the incorporation of HMI evaluation methods. There are three major aspects that need to be considered: Organisational aspects; Methodological aspects; and Technical aspects. The Brain Budget project will only focus on the methodological aspects. The second part in the report (Work Package 2) provides an overview of "state of the art" of HMI evaluation methods used in system development. Potential HMI criteria to measure during evaluation and testing are also defined. Based on the result from the literature review (WP2) and the findings of the needs analysis (WP1), a methodological approach (HMI Assessment Tool Box) on how to conduct HMI evaluation during system development is proposed.