publication Conference Paper 2020 Expected Maintenance Actions for Imperfect Production Processes Using a Markovian Approach more of publication Expected Maintenance Actions for Imperfect Production Processes Using a Markovian Approach 2020 An optimal production run for an imperfect production process with allowable shortages and time-varying fraction defective rate by M. A. Rahim and W. I. Al-Hajailan 2006