In the originally proposed run-by-run control scheme, the EWMA statistic is used as an estimate of the process deviation from its target. However, the controller based on the EWMA statistic is not sufficient for controlling a wearing out process. The PCC controller has been thus proposed to enhance the run-by-run controller capability. In this paper, we first reexamine the fundamentals of the PCC formulations and propose an adjustment that is advantageous in controlling processes subject to both random shifts and drifts. The adjusted PCC controller is then further refined to take into account the process age. This age-based double EWMA scheme is then applied to the CMP process, which is known in the semiconductor industry to be rather unstable.
Based on the competence-based perspective and contingency perspective, this study attempts to examine the relationships among first-mover strategy, a firm's core capacity, resource allocation, and new product performance. Our findings indicate that (1) firms achieve a better new product performance when adopting first-mover strategy and having an excellent core capacity, and (2) firms achieve a better new product performance if their core capacity (technical and managerial) fits the resource allocation they implement. Managerial implications and future research directions are discussed.
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