Preparation of a list of suitable instrumentation equipment for the offer of a combined cycle generation plant based on instrumentation pipe diagrams. Generation of requisitions of instrumentation equipment necessary to be taken to the purchasing area and coordinate with suppliers the precise attention of specifications. Preparation of comparative tables for instrumentation equipment based on the different offers per supplier. Diameter calculation for process lines as well as specification of materials based on the operating conditions. Preparation of data sheet for instrumentation equipment as document attached to equipment requisitions. Generation of technical opinions based on quotations received by suppliers.