This study aims at supplementing the empirical basis of using software evolution evaluation methods in industrial settings. An industrial case study applying Value-Based Decision Model (VDM) for software evolution strategy evaluations is presented. VDM considers the value of a legacy software system and proposes convenient evolution strategies. Use of VDM is characterized, and the case study described. VDM has been applied in case of a production-use, large-scale industrial legacy system. Results produced by VDM, VDM’s evaluation, and system evolution strategy recommendations are presented.