en Material Managment Material Managment پژوهشي Research We study the problem of order acceptance, scheduling and pricing (OASP) in parallel machine environment. Each order is characterized by due date, release date, deadline, controllable processing time, sequence dependent set up time and price in MTO system. We present a MILP formulation to maximize the net profit. Then under joint optimization approach, the pricing decisions set for unrelated parallel machine environment. The results show that the basic developed problem can solve the scheduling decisions based on different levels of products’ priced. Thus the problem solves these two categories of decisions simultaneously. Moreover, the changes of accepted orders in pricing levels can be analyzed regarding its dependency to price elasticity of items for future research. Order acceptance, Scheduling, Pricing, Make to order (MTO), Unrelated parallel machine. 195 205 http://ijiepr.iust.ac.ir/browse.php?a_code=A-10-1071-2&slc_lang=en&sid=1 Sahebe Esfandiari s7_esfandyari@yahoo.com 180031947532846005605 180031947532846005605 No Babol Noshirvani University of Technology Hamid Mashreghi Mashreghi.h@nit.ac.ir 180031947532846005606 180031947532846005606 Yes Babol Noshirvani University of Technology Saeed Emami S_emami@nit.ac.ir 180031947532846005607 180031947532846005607 No Babol Noshirvani University of Technology