The working instructions describe in a definite manner the work or tasks to be carried out for a specific function of the company, and it is always considered as a documentation of the third-level Quality System. They can be categorized into three types: Work Instruction, Control Instruction, and Maintenance Instruction.

Those instructions cover the overall process from planning the construction project to the administrative management of the raw material (Steel and others) up to the final product and the housing and building construction with beams and reinforced beams manufactured by Jansa Metal.