Apparel production has a labor-intense and complex production structure. It is not financially feasible to assign distinct lines and workers for the production of models with low production numbers and high variety. For this reason, assembly lines which allow the production of various models are widely preferred. In addition, the main drawbacks of the apparel industry are low efficiency and line balancing and planning difficulties stemming from low order numbers. In this study, the problems of assembly line balancing and some recommendations in a small scale company producing mixed-model men's shirts have been extensively studied. The main aim is to construct lines which allow the assembly of orders on various volumes and models and to balance the assembly lines in order to deliver goods of the required quality and productivity and at the lowest cost. The data has been analyzed via COMSOAL (Computer Method for Sequencing Operations for Assembly Lines) which is an intuitive and meta-intuitive algorithm. Computer Method for Sequencing Operations for Assembly Lines is also used to tabulate assembly line operation.