Development and maintenance of embedded control software has been a difficult challenge for the manufacturing industry because of the diversity of customers’ needs, rapidly changing market requirements, and the quick response of market competition. LG Industrial Systems Co. Ltd. (LGIS), one of Korea’s leading suppliers of elevator control systems, has been faced with the same difficulty in the development and maintenance of elevator control software (ECS). To help LGIS we have adopted a domain-oriented approach for reuse, and verification and validation technology for improving software quality. We have found that we can reduce maintenance costs drastically as the software is developed by utilizing reusable and adaptable components that can easily accommodate contextual as well as requirement changes, and have verified and validated ECS in the early phase of development.