A bill of quantities is essentially a list of all the materials and labor that will be required for your desired building. Making any building or structure involves many things, but few are as important as materials and labour. Without these two elements, there’s little use for a plan and schedule. Materials and labour are some of the main resources that construction projects work with and are instrumental to delivering a workable project plan.
All construction projects begin with a bill of quantities. it’s so important to construction project management.
WHAT IS A BILL OF QUANTITIES
A bill of quantities is essentially a list of all the materials and labour that will be required for your desired build. It’s often put together before a construction contractor has been hired and is a guiding document for proper project execution.
Once the construction project has been approved to move forward, an owner will usually employ the architect or engineer to draw up the bill of quantities. Since the document is a thorough listing of all the needed materials and labor, these two professionals will have the clearest picture of what those materials and laborers are
The bill of quantities is then used as a means of forecasting costs, which helps the owner and the contractors in that they both have a better picture of the price of completing the construction work. Therefore, owners know which quotes are competitive and contractors can better estimate their profit margins.
BOQ IMPORTANCE
The bill of quantities might seem like a straightforward construction document, and in many ways, it is - but it's not as simple as some make it look to be. This is where you first detail all the materials and labour you’ll need to execute your project. This process is critical in finding the best prices for the materials and labour you need before you’re committed to the execution of that construction project.
It’s also helpful in figuring out the scope of the project. Once you have all the materials and labour charted out on your bill of quantities, it’s only a small step forward to detail the tasks that’ll be required to meet the goals of the project.
the owner of the project can use the bill of quantities as a cost control. The breakdown of the bill of quantities will inform the project schedule which allows the project owner to understand the amount of work that’ll be done in each billing cycle. They can then prepare the cash flow and measure the project’s progress.
1. Standardising the tendering process
- BoQs standardise the tendering process, allowing contractors to prepare precise cost estimates based on the same information.
- This fosters fairness and transparency in the tendering process.
2. Facilitating tender analysis
- BoQs enable thorough tender analysis, where both total project costs and individual rates can be evaluated.
- This ensures that contractors submit complete, compliant bids that align with specifications and meet budgetary goals.
3. Cost control and projections
- BoQs provide detailed schedules and breakdowns, offering owners visibility into cash flow needs over various project cycles.
- This helps in predicting and managing project expenditures effectively.
4. Foundation for contracts
- BoQs act as the foundation for the final contract between the client and the contractor. In case of disputes or claims during construction, they provide a reference point for conflict resolution.
5. Transparency and error reduction
- By specifying materials and labor, BoQs create transparency around scope and pricing, reducing errors and misunderstandings.
- This ensures that all parties have a clear understanding of the project’s requirements.
6. Maintenance and future expansion
- The comprehensive information within a BoQ becomes an invaluable record for future maintenance, repairs, and potential expansions.
- This saves time and effort compared to re-quantifying for subsequent work on the project
In summary, BOQs play a crucial role in making the tendering process more uniform, pricing more precise, and project costs more predictable. They serve as a cornerstone document, not only during the construction phase but also for the long-term management and development of projects.
BOQ COMPONENTS
A bill of quantities can be used for many purposes, but its main goal is to act as a list of all the materials and labour that’ll be used over the course of a construction project. This means it must capture the relevant details for these items to be useful. There are, of course, different bills of quantities, but the following is usually the common denominator among all of them.
Project information
It includes project details like the project name, owner, location, and the BoQ’s date of creation. This context is essential for clarity and record-keeping.
Item Number
First, you’ll want to number your list. Each item, whether material or labour, should have a corresponding number to make it easier to find as the list grows long.
Item List
Now you’ll want to differentiate between the two types of items on your bill of quantities. Here’s where you’ll note if it’s a material or labour.
Item Description
Next is the item description, for example, “paint” would describe an item. But you’ll want to add some context, especially since there’s likely to be paint used for a number of different things in the construction project. Consider adding paint with a short description, such as for the exterior of the building.
Measurement Unit
Whether the item is material or labour, you need to define how it’s measured. For instance, the material would be by the gallon if it’s paint, while the painter would be measured by the hour because they’re a laborer.
Quantity
Another important piece of information that’s critical to a thorough bill of quantities is the quantity of each item. How many gallons of paint will you need to paint the exterior of the building, and how many hours will it take for the painters to do this job? The answer to these questions is detailed here.
Cost Per Unit
Also important is the price of the materials or the labor which is listed here. For example, a gallon of paint might cost $5 while the painters are contracted at $25 per hour.
Total Item
Cost Finally, you’ll want to address the total cost for each line item. Multiply the paint’s price per gallon by the amount of paint you need to do the job. The same is done for labor. At the bottom of your bill of quantities, you’ll add all these totals together to get a grand total for all the materials and labor that’ll be used in the construction project.
Terms and conditions (optional)
Some BoQs include terms and conditions related to the project, such as warranties, payment terms, and other contractual details.
A well-structured BoQ with itemised lists, clear descriptions, and comprehensive cost calculations provide a financial overview for construction projects. It not only guides procurement and scheduling but also serves as a vital tool for cost and commercial management.
WHO IS RESPONSIBLE FOR CREATING THE BOQ?
The project owner is responsible for the bill of quantities. However, they’re rarely the ones who put together the bill of quantities. While they need one in place, they more often than not delegate the responsibility.
That’s perfectly reasonable as the construction project owner is not necessarily privy to all the details of the project. That’s why they’ll give the task to the architect and the engineer or quantity surveyor - professionals who have a close relationship with the various materials and the labour necessary to build the construction project.
BOQ TYPES
It’s imperative that we learn about the different types of bills of quantities or we would rather term them as different stages for a bill of quantities.
Preliminary Bill of Quantities (PBQ) – This bill estimates the initial project costs, covering concepts like site preparation and early-stage construction activities.
Approximate Bill of Quantities (ABQ) – An approximate bill of quantities (ABQ) provides cost estimates for different construction phases, helping with budgeting and financing.
Revised Bill of Quantities (RBQ) – RBQs are updated versions of the original BoQ, reflecting changes in the project scope or design.
Firm Bill of Quantities (FBQ) – A firm bill of quantities (FBQ) is a finalised and agreed-upon version of the BoQ, used for tendering and contract execution.
Provisional Bill of Quantities (PBQ) – Provisional Bill of Quantities (PBQ) includes items with uncertain quantities or costs, often used when exact figures are hard to determine during project planning.
Contractor’s Bill of Quantities (CBQ) – The contractor prepares CBQs, detailing their specific requirements and pricing for a project, often in response to an FBQ.
These different types of bills of quantities explain the progress of the bill and what clients and contractors should expect at what stage. According to the BoQ type, some steps in the creation process might vary but the whole idea is pretty much the same.
CREATING BOQs
1. Initial project documentation Begin by collecting all relevant project documents, including architectural plans, engineering drawings, and specifications. These documents set the foundation for your BoQ.
2. Itemisation and categorisation Review the project documents thoroughly and itemise all materials and labour required. Categorise items as either materials or labour and provide concise, yet detailed descriptions for clarity.
3. Quantify with costs Based on the project specifications, start with quantifying all the items required in the projects and their associated costs. Calculate the total costs involved. This will also help you calculate the total man hours required to complete the project.
4. Quality control Review and cross-check your BoQ thoroughly to ensure accuracy and consistency. This is a crucial step to avoid any errors. It’s best practice to get more eyes to review your bill of quantities, leaving zero space for any discrepancies.
5. Compliance and standards Ensure that your Bill of Quantities adheres to the relevant standards and guidelines in the UK, such as the New Rules of Measurement (NRM) or any specific industry standards applicable to your project.
6. Final compilation Organise your BoQ in a clear and easily understandable format. Include a cover page with project details and any terms and conditions if required.
ACCURACY TIPS AND BEST PRACTICES
** Keep abreast of industry changes, regulations, and market rates in the market you are working in. Regularly update your BoQs to reflect current conditions.
** Maintain consistent terminology and item descriptions throughout the BoQ to avoid confusion. Refrain from adding vague variances while doing measurements. Do it accurately by referring to the drawing section and details.
** Consider utilising specialised software for BoQ preparation like CostX, which can enhance accuracy and efficiency. Ensure to write detailed descriptions with available specifications and details.
** Engage with architects, engineers, and contractors to ensure alignment between the BoQ and the project’s technical specifications.
** If in doubt, consult with a quantity surveyor or construction cost consultant to ensure your BoQ meets industry standards.
Creating a bill of quantities is an essential skill for construction professionals. By following this step-by-step guide and adhering to best practices, you will equip yourself to prepare accurate and reliable Bills of Quantities (BoQs) for your construction projects.
WHEN SHOULD YOU USE A BOQ
The bill of quantities is used by the construction industry owner when calculating the total cost for a project. This allows the owner to understand the cost of the project and how it’ll be paid over the various phases of the project. This is all done before the execution of the project.
With our Build Now Pay Later, it's mandatory before we can give you a workable construction contract.
While the bill of quantities is generally used before ground is broken on the construction project, it can be helpful in tracking progress after execution as well. By looking at your list of materials and labor and seeing what’s been done and what’s still to be done, you can get a general idea as to where you are in the project.
BOQ EXAMPLE
We provide a simple example below of how a Bill of Quantities documentation will look like.
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BILLS OF QUANTITIES AS A BNPL SERVICE
At Build Now Pay Later (BNPL), we take pride in our role as a global construction consultancy, and one of our core services is providing accurate Bills of Quantities (BoQs) to our valued clients and contractors. With a commitment to precision and professionalism, BNPL has established itself as an industry expert in delivering comprehensive BoQs. Our team of experienced professionals brings a wealth of knowledge and expertise to the table, ensuring that our clients receive BoQs that are not only accurate but also aligned with industry standards and regulations.
While our focus is on accuracy, we approach this service with a client-centric mindset, understanding the unique needs and specifications of each project. Through our BoQ services, we aim to facilitate cost-effective project management and procurement, ultimately contributing to the success of your construction endeavours.
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