Conventional projects are included three sides of contract:

• Client as owner and buyer
• Consultant as supervision system
• Contractor as responsible of implementing

According to the experience of several decades in Ray-Ab consulting engineers as supervision of projects, the following engineering services are managed in the largest department of Ray-Ab Co. including 400⁺ people in the 25 provinces of Iran:

• Technical services
• Supervisory services

Since the two departments of studies and supervision have diverse experiences in basic design and detailed design (in studies projects) and overall supervision and site supervision (in executive projects) Ray-Ab Co. provides engineering services in EPC projects by combination of capabilities of these two departments.