AbstractExtensive organizational changes in the management of product development work of industrial companies are currently taking place. Speediness (time‐based competition) and/or ‘high’ quality (total quality) are emphasized and for this purpose concepts such as simultaneous, concurrent or integrated product development have been introduced. This paper describes a study of the importance of these concepts in 29 large Swedish manufacturing companies and how these companies deal with the implementation of the new product development concepts. In addition, three in‐depth studies have been carried out to enable a more detailed study to be made of the effects of the product development work on time and quality va