Software development based on product lines has been proved a promising technology that can drastically reduce cycle time and guarantee quality by strategically reusing quality core assets that belong to an organization. This paper presents a context-based measurements elicitation approach for product lines that reflects the performance characteristics of product lines and the diversity of their application. The approach includes both detailed procedures and work products resulting fi-om implementation of the procedures, along with their templates. To show the utility of the approach, this thesis presents the elicited measurements, especially for technical management practices among product line practices.