Steps to Prepare a Bill of Quantities

How to Create an Accurate Bill of Quantities

Steps to prepare a Bill of Quantities (BoQ) are essential for quantity surveying. A BoQ helps contractors understand the exact materials and work needed for a construction project. It ensures prices can be compared fairly and helps control costs. Here is a clear guide to preparing a BoQ.

Step-by-step process to prepare a Bill of Quantities

1. Study the Project Documents
   Begin by thoroughly reading all project drawings, specifications, and any relevant documents. Understand the design, materials, and methods needed. This helps you avoid mistakes during measurement.
2. Divide the Project into Sections
   Break the entire project into manageable parts, such as foundations, walls, roofs, finishes, and services. This makes quantification easier and more organised.
3. Carry Out Measurements
   Use the drawings and documents to measure quantities of materials, labour, and plant work needed. Follow the standard methods of measurement, like the SANS 1200 series or the New Rules of Measurement (NRM), to stay consistent and accurate.
4. Record Quantities Clearly
   Write down all measurements in a clear format. Include units like m², m³, or number of items. Record enough detail to avoid confusion when others read your BoQ.
5. Prepare a Description for Each Item
   Describe each work item precisely, including the work type, materials, and quality. Use simple language that contractors will understand and can price correctly.
6. Compile the Bill of Quantities Document
   Arrange the measured items in order based on the project sections. Add item numbers, descriptions, measured quantities, and units. Leave space for pricing by bidders or contractors.
7. Check and Review
   Carefully check all measurements and descriptions. Review calculations and ensure there are no overlaps, omissions or errors. It is helpful to have another person verify the BoQ.
8. Issue the BoQ for Tender
   Once completed and reviewed, give the BoQ to potential contractors. This allows them to price work accurately and submit fair bids.

By following these steps to prepare a Bill of Quantities, quantity surveyors can produce clear, accurate documents that assist with tendering and project control. Accurate BoQs reduce disputes and help projects run smoothly.