Design and survey operations are a series of operations on conducting engineering surveys, developing feasibility studies for construction, developing designs and detailed designs, drawing cost calculations for construction (greenfield construction, expansion, reconstruction, or technical upgrading) of facilities, buildings, and structures. Survey operations are a series of technical and economic studies of the construction area.

The purposes of design and survey operations include:

• Taking into account all facility features during design;
• Developing detailed documentation;
• Improving work performance safety.