Quick answer: what does a resource breakdown calculate?
Multiply the quantity of each line item by its unit consumption and add the contributions of the same resource. It is not a purchase order: you still have to check stock, presentations and supply dates.
In the teaching example in this guide, 80 indoor m² and 20 outdoor m² require 26 L of paint, 19 L of primer and 4.20 workdays of labor crew. The breakdown and assumed prices are explained below; They are not consumption factors and productivity rates recommendations or quotes.
The resource breakdown brings together the resources you need to execute the line items of a budget. While the catalog answers what jobs you will do and how much they cost, the resource breakdown allows you to review how much paint, steel, labor or machinery those jobs require.
It is useful for preparing supply needs and reviewing costs. Its result depends on the quantities in the catalog and the consumption of the analysis: if one of these data changes, you must update the resource breakdown.
What is a resource breakdown
It is the breakdown and accumulation of resources based on the quantities of work. For a shared resource, its contribution is calculated in each line item and then the compatible consumptions are added.
Resource quantity = line item quantity × resource consumption per unit.
As a hypothetical example, if an activity requires 0.25 liters of paint per m² and the catalog contains 80 m², its contribution is 20 liters. If another activity consumes the same paint, add its contribution as well.
Resource breakdown is a documented feature in budgeting tools like OPUS and KOSAN. An official OPUS 24 manual explains that the way of calculating and rounding can generate differences between the resource breakdown amounts and the budget amounts. This reference describes the version of the manual and does not demonstrate identical behavior in all versions. Sources: OPUS products and OPUS 24 manual, “Type of adjustment” section.
The source data is explained in the guide on how to calculate consumption in an APU.
What resources should you consider
The resource breakdown may include materials, labor, equipment and other resources of the analyzed scope. An auxiliary unit price analysis needs to be broken down if you want to know its internal resources, not just the total cost of the auxiliary.
| Data | Review question |
|---|---|
| Quantity of work | Does it correspond to the current version of the catalogue? |
| Consumption | Does it include the waste that applies? |
| Unit | Can it be added to other records? |
| Price | Does it belong to the chosen currency and reference date? |
| Auxiliary unit price analysis | Is it being disaggregated without duplicating resources? |
| Scope | Does it include the entire work or just a chapter? |
Don't automatically add two records with similar descriptions. Please confirm that they represent the same material, specification and unit.
The other input to the calculation is the quantities and budget catalog.
Worked resource breakdown example
Let's assume two primer and paint application line items: 80 m² on an interior work area and 20 m² on an exterior work area. For this exercise they both use the same products and the same labor crew. The table groups the labor crew to simplify the calculation; A detailed resource breakdown can break it down by worker category.
All consumption, consumption factors and productivity rates and prices are hypothetical and didactic. They do not represent recommended dosages, quotes or market values. In a real job, verify products, support, procedure and technical sheet.
| Resource | Consumption per m² interior | Consumption per outdoor m² | Total for both fronts |
|---|---|---|---|
| Paint | 0.25 L | 0.30 L | 80 × 0.25 + 20 × 0.30 = 26 L |
| Primer | 0.20 L | 0.15 L | 80 × 0.20 + 20 × 0.15 = 19 L |
| Labor crew | 0.04 workdays | 0.05 workdays | 80 × 0.04 + 20 × 0.05 = 4.20 workdays |
In this exercise, consumption is taken as final quantities per unit of work. No additional percentage of waste is added.
How to obtain the direct amount
With assumed prices of $160 per liter of paint, $90 per liter of primer and $1,000 per workday of labor crew, and an illustrative small-tools allowance of 5% on labor:
| Resource | Quantity | Assumed price | Amount, MXN without VAT |
|---|---|---|---|
| Paint | 26 L | $160.00/L | $4,160.00 |
| Primer | 19 L | $90.00/L | $1,710.00 |
| Labor crew | 4.20 workdays | $1,000.00/workday | $4,200.00 |
| Small tools | 5% of labor | Base: $4,200.00 | $210.00 |
| Direct total | $10,280.00 |
The control by line item reaches the same result: the interior work area has a direct cost of $100 per m² and the exterior of $114 per m². then 80 × $100 + 20 × $114 = $10,280.
The equality shows that the example reconciles in two ways: line items and resources. In a real budget, document differences due to rounding and items that are presented separately.
The 5% tool is an assumption, not a mandatory rate. The labor crew cost in this example includes only labor; If a composition already incorporates a tool, review that charge before adding another percentage.
Why is it not equivalent to a purchase order?
The resource breakdown shows a calculated technical need. To convert it into purchases you need to consider usable stock, pending orders, pack sizes, deliveries and execution schedule.
Buying 26 liters may require different combinations of containers depending on the product. Choose the presentation with supplier information and record how the need will be met; do not change the technical consumption just to make it match the packaging.
You should also not purchase all the resources for a project at once without reviewing storage, sequence, and usage dates. The total quantity and supply schedule answer different questions.
What to check when the resource breakdown does not reconcile
Compare the same base
The resource direct cost does not have to equal a sales total that includes overhead, financing, profit, or taxes. Before looking for an error, align scope and basis of comparison.
Find duplicates and omitted resources
Checks if a mixture was loaded as an auxiliary and also with its materials. Review percentage tool, subcontracts and line items with price captured without analysis: they may require a different representation than that of a physical material.
Check units and update
A resource recorded in kilograms should not be added directly to another in tons. Check conversions, quantity changes, recalculation date, and decimal policy before attributing a difference to the price.
You can also evaluate the resource breakdown in a software with a reconciliation test.
How to work with KOSAN
KOSAN has a resource breakdown linked to the budget and its APUs. Its engine also runs through auxiliary unit price analyses to consolidate the resources they contain and considers percentage contributions as a minor tool.
After modifying quantities, prices or compositions, recalculate and review the result. You can use it as a reference to prepare purchasing needs, keeping the scope and version of the project identified.
Frequently asked questions
Are material breakdowns and resource breakdowns the same?
The materials department focuses on material resources. That of resources may also include labor, equipment and other budget resources. Review the filters and scope of the report you use.
Does the resource breakdown include waste?
It will be included if the analysis of origin contemplates it and the calculation considers it. Check how it is registered; Adding it back to an already adjusted consumption can double the need.
Can a bill of quantities alone produce a purchase list?
If the catalog only contains quantities and prices of jobs, the resource breakdown is missing. You need their analysis or an additional calculation of consumption, in addition to inventory and programming to decide purchases.
Get to know KOSAN and review how to connect your unit price analysis with the resource breakdown of the project.
From unit price analysis to a construction estimate
Calculate the daily cost of labor with the labor burden factor (FSR) calculator. Then check how it integrates into a example work budget in PDF and Excel, with catalog, unit price analyses APU and resource breakdown.