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Which Construction Estimating Methods Are Most Suitable for Large-Scale Commercial Projects

ericwillson09 mins
Large-scale commercial construction estimating methods require precision; there is no room for error. The level of success in a commercial building project can therefore all depend on how well the cost of the building was estimated. There are a number of construction estimating methods that can be used in a construction project. However, it is important to choose the correct one in order to improve efficiency and bear costs. In this article, we will assess the different construction estimating techniques applicable to large commercial construction projects and inform you on what technique to choose.  

Understanding Construction Estimating Methods

Cost control techniques are used in construction to forecast the quantity and cost of resources to be used for a project. Estimation is a critical aspect of a project, especially in planning and budgeting, and can be costly if not done accurately. Smaller-scale projects may rely on rudimentary estimate methods; however, large-scale commercial construction projects require rigorous estimates. Before proceeding, let us discuss some of the best approaches to a commercial construction estimating project.  
  • Unit Cost Estimating
Estimation by unit cost is most commonly used for large commercial building projects. Unit cost estimation is one of the most widely used construction estimating methods for large-scale commercial projects. In this method, raw materials and human resources are accurately considered. Each element is given a unit price, and then the total price is computed by multiplying the unit cost by the quantity. Rewards of Unit Cost Estimating
  • Highly accurate
  • Ideal for recurring tasks
  • Cuts appropriately for elaborate business ventures.
When to use it: Recommended for projects with clearly defined tasks and responsibilities such as office buildings, shopping malls, etc.  
  • Detailed Estimating
This is also called bottom-up estimating and is characterized by the breakdown of each project element. This includes materials, labor, overhead, and any other cost required to produce a figure that will give you a precise estimate. Despite the time consumption, this method is often applied in large-scale commercial projects because of its reliability. Rewards of Detailed Estimating
  • Comprehensive and precise
  • Helps to identify possible cost reductions.
When to use it: Great for all the large tasks such as building a hospital or industry where every little detail matters.  
  • Assembly Estimating
Assembly estimating involves estimating groups or “assemblies” of the items rather than individual parts. For instance, instead of one cost estimate for bricks, cement, and wage rate for labor, it would have a single cost estimate for constructing a wall or ‘wall-building’ assembly. Rewards of Assembly Estimating
  • It is faster than detailed estimating.
  • Useful for tedious tasks
When to use it: It is ideal for discrete segments of industrial applications such as the piling or structural framework of a building or air conditioning ducts.  
  • Parametric Estimating
Parametric estimating is a formula-based technique where numerical data and past performance are used to estimate costs based on certain parameters, such as the number of square feet or man hours anticipated for the project. It is quicker than detailed or unit cost estimating and offers reasonably good results. Rewards of Parametric Estimating
  • Faster than other techniques.
  • Based on verified models and data.
When to use it: A good first-pass estimate when you only want quick cost forecasting.
  • Rough Order of Magnitude (ROM) Estimating
ROM estimating is the preliminary rough estimate that can be produced from limited information, typically with an accuracy of 20–30%. It is fast but inaccurate and, therefore, suitable in the first stages of the planning process. Rewards of ROM Estimating
  • Quick and easy
  • Useful for early planning
When to use it: ROM estimating should be used at the beginning of the project when little information is available.  

Opting for the Construction Estimating Methods

Choosing the right method depends on several factors: Project Complexity: Detailed or unit cost estimating should be applied for complex building-type projects such as skyscraper projects because of their accuracy. Available Data: Historical information can be used when employing parametric or assembly estimating, as it provides a relatively quick yet very precise estimation. Project Stage: When a project is initially designed, approximate measures suffice, but accurate measures are needed as the project is implemented. Time Constraints: If there is a time constraint, you can use parametric or assembly estimation. It offers accurate results and saves time.  

Merits of Outsourcing Commercial Estimating Services

It is common to find organizations tendering their commercial construction estimating to professional service providers. Smaller firms lack the resources to develop such tools, and more importantly, they may not have a specialized Architectural Engineering industry focus.

Perks of Commercial Estimating Services

Access to advanced software Large commercial property experience Reduced risk of errors Faster turnaround times When you want to estimate a commercial building, hiring a professional will ensure efficiency and accuracy. Bidding Estimate is a high-quality construction estimating company of specialists who offer accurate cost estimations within 24 hours. They bring together a team of experienced professionals who aim to deliver reliable estimates that define the industry’s standards.  

Closing Remarks

Therefore, choosing the right construction estimating method is essential for large commercial construction projects. Methods such as unit cost estimating, detailed estimating, and parametric estimating can be classified according to the level of precision provided, depending on the level of project development. When you know each method’s pros and when to employ it, you will be better positioned to make the right choices to ensure your commercial construction project proceeds as planned. Commercial estimation services offer the best solution for reaching efficiency and accuracy in several businesses. 

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