“…Task processing times: The disassembly task processing times are the most common uncertain parameter considered in DLB models. While , Özceylan and Paksoy (2014c), Kalayci et al (2015b), Seidi and Saghari (2016) and Zhang et al (2017) assumed fuzzy task processing time; the disassembly task times are assumed to be independent random variables with known and normal probability distributions by Kekre et al (2003), Ranky et al (2003), Gupta (2004, 2005), Agrawal and Tiwari (2008), Karadağ and Türkbey (2013), Bentaha et al (2013aBentaha et al ( , 2013bBentaha et al ( , 2013cBentaha et al ( , 2013dBentaha et al ( , 2013e, 2014aBentaha et al ( , 2014bBentaha et al ( , 2014cBentaha et al ( , 2014dBentaha et al ( , 2014e, 2015aBentaha et al ( , 2015b A general summary of uncertainty issues in existing DLB studies is given in Table 4. As can be seen from Table 4, all factors except task failures are considered fuzzy, and the task processing time is the most frequently studied uncertain factor handled as stochastic.…”