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2 2022

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An empirical examination of the relationship between capability maturity and firm performance across manufacturing and IT industries

100%

Hayes L. , Lu J. , Rezania D.

Management and Production Engineering Review

2022

tom Vol. 13, No. 2

61--70

We investigate the effect on firm performance of the motivation for applying maturity models in manufacturing and information technology organizations. We expect the association between profitability and maturity models to be less if motivated by external contract requirements (e.g., for certain government contracts), than if motivated internally to improve pro- cesses. Using a sample of firm-year observations for 1,105 SEC registrants in the manufacturing (Standard Industry Classification (SIC): 3600∼3812) and IT industries (SIC: 7370∼7374) for 2017 and 2018, and CMMI information from the CMMI institute published appraisal results system, it is observed that 28 public firms (17 IT firm-years and 23 manufacturing firm-years) in the sample had CMMI appraisals between 2017 and 2018. We use logistic regression to test if the likelihood of CMMI appraisal is positively associated with government sales. The results support for the manufacturing industry, but not for the IT industry, prior research’s assertion that maturity is a source for competitive advantage.

Study on acoustic logging response of fractured reservoirs using a novel equivalent medium model

88%

Wang B. , Li W. , Lu J. , Jin W. , Hu S.

Acta Geophysica

2022

tom Vol. 70, no 6

2695--2704

Acoustic logging is one of the most effective methods for fractured reservoirs exploration. To understand the measurement characteristics of fractured reservoirs is the key procedure to evaluate the reservoir using acoustic logging data. By combing the Hudson equivalent theory and the Schoenberg’s theory, a novel acoustic equivalent medium theory of fracture reservoir was constructed. Bond transformation is introduced to model fractures with arbitrary azimuth and polarizing angle. The response of fractured reservoir measured by acoustic logging tool is simulated using a finite difference code. The influences and acoustic responses from crack density, width, angle and filling material on compressional and shear wave slowness of acoustic waves are analyzed and summarized. The analysis results can provide a theoretical foundation for evaluations of fractured formations with acoustic logging data.