“…Some important research has been done in parallel machine environment considering different assumptions such as resource constraints (Hou, 2013), sequence-dependent setup times (Hou, 2013), machine eligibility constraint in automotive gear industry (Gokhale & Mathirajan, 2012), single batch delivery of production by vehicles in a supply chain (Cakici, Mason, Geismar, & Fowler, 2014), and acceptance or rejection possibility of jobs in order to minimize total penalty cost from rejections and make-span of accepted jobs (Zhang, Lu, & Yuan, 2009). Mokhtari and Abadi (Mokhtari & Abadi, 2013) designed a Non-Linear Programming (NLP) model to solve a single-stage scheduling problem with outsourcing option with the aim of total cost minimization.…”