Zagros Drilling Optimization Company (ZDOC) is a knowledge based company which has provided drilling solutions and optimization services and an integrated drilling optimization approach using highly expert drilling and software engineering specialists. ZDOC R&D team has developed an innovative, practical and operational software to consider and optimize all drilling parameters such as mechanical, hydraulic and drilling fluid parameters, bit selection and so on. OptiTech software has an innovative hydraulic optimization approach to perform hydraulic calculations with regard to operational limits and all of corrections. ROP prediction by artificial intelligence and analytical models is done with high accuracy in OptiTech Software. The main ambition of Zagros group is to improve and enhance OptiTech software.