Quality and Cost based Selection (QCBS)
We will now learn about the features of QCBS.
QCBS is a method based, both on the quality and the cost of the services provided. It is the most commonly used method of selection for services. Under QCBS the technical and financial proposals are submitted simultaneously in separate sealed envelopes. Evaluation of the proposals is done in two stages-quality and cost. You have to open the technical proposals first and evaluate and notify the technical scores publicly. The financial proposal of those consultants qualifying the stipulated minimum requirement is then evaluated. The technical and financial scores must be combined and you should select the consultant obtaining the highest combined score.
Where appropriate
You should adapt this method when:
- The type of services required is common and not too complex.
- You can define the scope of the work with precision and the TOR is clear and well specified.
- You as well as the consultant can estimate with reasonable precision the staff time, the assignment duration and all other inputs with respect to cost.
- The risks of estimated are quantifiable and manageable.
To ensure receipt of responsive proposals, the RFP under QCBS should indicate the level of key staff inputs (in staff time) estimated by you (the client) to carry out the assignment or the estimated cost of the services, but not both.
Type of assignments for which this method of selection is adopted
You should use QCBS for the following assignments:
- When the assignment is simple and well defined with proper feasibility study.
- Preparation of bidding documents and detailed designs.
- Supervision of the construction of works and installation of equipment.
- Technical, financial or administrative services of noncomplex nature.
- Procurement and inspection services.
QCBS may not be appropriate for complex or specialised assignments in which the scope of the assignment is not well defined and staff time are difficult to estimate.