Schlumberger Oiijield Services started a software reuse effort at its Austin System Center (ASC) in 1988.ASC is responsible for computer systems integrated into products used within Schlumberger or sold to oil companies for oil data acquisition, transmission, and analysis.The group responsible for this reuse effort, known as the Common Software Library (CSL), is composed of 10 engineers who manage 17 common software component libraries used in several Oiljield Services products.The CSL has approximately 2 million lines of co&; the 16 products, into which some or all of the CSL libraries are built, have 1 million to IO million lines of code each.Since its inception, the group has found that a successjiul reuse strategy requires as much eflort in dealing with people management issues as it does with technical issues.This article offers one model for how to introduce a software reuse program into an organization, how such a program can be efficiently managed, and what major challenges and achievements may be expected.

A corporate-wide software process improvement effort has been ongoing at Schlumberger for several years. Through the motivation efforts of a small group, productive changes have occurred across the company. We see improvements in many development areas, including project planning and requirements management. The catalysts behind these advances include capability assessments, training, and collaboration.>