Umair Gaines
Estimating man-hours is a critical aspect of project management in the electrical industry. It involves calculating the labour required to complete a task, which is typically measured in man-hours or person-hours. This metric represents the amount of work performed by an average worker in one hour and is essential for estimating the total labour cost and duration of a project. RS Means is a widely recognised source for estimating reference, offering publications and online data on labour productivity, material costs, and other factors relevant to electrical projects. By utilising RS Means data, contractors can establish a baseline and make adjustments based on specific conditions, crew efficiency, and individual labour costs. This enables them to accurately determine the number of electricians, foremen, journeymen, and apprentices needed for a project, ensuring efficient resource allocation and cost management.
| Characteristics | Values |
|---|---|
| RS Means | The golden standard for estimating reference. They publish books and online data on labor productivity, material cost, and various other factors. |
| RS Means online | Produces (Crew) Labor Hours per unit. |
| Estimating man-hours | Depends on crew efficiency, the number of electricians, and the duration of the project. |
| Man-hour | Amount of work performed by an average worker in one hour. |
| Labor Unit | Benchmark used by a company or estimator to determine the labor value of an installation. |
| Multi-story building labor additions | 1 to 2 floors +0%, 3 to 4 floors +2%, 5 to 6 floors +3%, 7 to 8 floors +5%, 9 to 10 floors +7%, 10 to 15 floors +15%. |
| Labor Breakdown Conversion Chart | .05 Man Hour = 3 minutes, .10 Man Hour = 6 minutes, .25 Man Hour = 15 minutes, .50 Man Hour = 30 minutes, 1.00 Man Hour = 1 hour |
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What You'll Learn
RS Means is a good starting point for estimating man-hours
RS Means offers powerful construction cost estimating software, with cloud-based access to a vast and industry-leading construction cost database. This includes advanced features like square foot costs and predictive cost data. The database contains over 85,000 unit prices, 25,000 building assemblies, and 42,000 facilities repair and remodelling costs, covering every category of construction.
The RS Means database is also adjustable to any location in the US and Canada, allowing users to customize, save, share, or export costs with ease. This is especially useful for those needing to create quick, conceptual cost estimates in the office, with a client, or in the field. The data is updated quarterly to ensure users have access to the most current information, and it is available in convenient book, CD, eBook, and online formats.
RS Means provides dependable, locally relevant, accurate, and up-to-date cost data, including historical and predictive cost trends. This helps users refine their estimates and bids, make data-driven decisions, and improve project outcomes. Many estimating programs have built-in production rates based on RS Means data, and it is a valuable tool for determining costs relative to other markets.
While RS Means is an excellent starting point for estimating man-hours, it is important to note that other factors can influence the actual labour hours required for a given task. These include crew efficiency, historical rates, and specific job requirements or details that may impact the speed at which a job can be completed.
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The number of electricians required will depend on the job
The number of electricians required for a job will depend on several factors, including the size and complexity of the electrical work, the specific skills and knowledge needed, and the time frame for completion. Here are some common types of electrical jobs and the number of electricians that may be required for each:
For residential electrical work, such as installing, repairing, or maintaining electrical systems in homes, a single electrician or a small team of two to three electricians may be sufficient. Residential electricians often work alone but may require assistance for larger projects or when specialized skills are needed. They may also need to collaborate with other professionals, such as contractors or plumbers, which can influence the required team size.
Commercial electrical work typically involves larger-scale projects in establishments like warehouses, retail stores, and factories. These projects often require handling higher voltage levels and more complex electrical systems. Commercial electricians may work in teams of two or more, depending on the scale and complexity of the project. For example, installing electrical systems in a newly constructed building may require a larger team of electricians to meet the project deadlines.
Industrial electrical work is another specialty that deals with alternative power generation, renewable energy projects, and electrical systems in factories. These projects can be highly complex and involve unique challenges, such as working with specialized equipment or adhering to specific industry regulations. Industrial electricians often work in teams to tackle these projects due to the scale and technical demands. The team size can vary from two to five or more electricians, depending on the specific requirements of the job.
Automotive electrical work focuses on electrical systems in vehicles, including headlights, alarm systems, and starter motors. It often involves liaising with automotive engineers and technicians to ensure the correct equipment is installed. While some automotive electrical jobs may be completed by a single electrician, certain projects, especially those in larger automotive shops or manufacturing facilities, may require a team of electricians to efficiently manage the workload.
It's important to note that the number of electricians required for a job can also be influenced by factors such as crew efficiency, work ethic, and individual skill level. Additionally, the availability of labour and the specific requirements of the project can impact the team size. Estimating programs and resources like RS Means data can provide valuable insights into labour productivity and help in determining the appropriate number of electricians needed for a particular electrical job.
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Efficiency of the crew will impact labour costs
The efficiency of the crew has a direct impact on labour costs. A larger crew size tends to increase work output, while a higher proportion of unskilled workers can decrease both work output and labour costs. For instance, a two-person crew may take a different amount of time to install 500 linear feet of metallic conduit over a 10-foot suspended ceiling compared to a crew of four.
Additionally, the productivity of the crew will also influence labour costs. A productive crew that takes regular breaks, maintains a positive work culture, and has efficient processes in place can help keep labour costs down. For example, a crew that wears "nail aprons" with screws, conduit straps, and other tools at their waists, and has "parts boxes" hung on lift rails can work more efficiently than a crew that has to stop work to gather tools and materials.
To increase crew productivity, it is important to provide good leadership and treat crew members with respect, care, and consideration. Encouraging autonomy, rather than micromanaging, can also lead to higher productivity. Setting whole-crew targets and providing meaningful feedback and praise can further enhance crew efficiency.
When estimating labour costs, it is essential to consider the crew's efficiency and productivity. While RS Means data provides valuable information on labour productivity, it may not account for the specific dynamics of a particular crew. Therefore, it is crucial to assess the crew's composition, skills, and working practices to accurately estimate the labour costs for a given project.
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Historical averages can be used to inform estimates
Electrical work often involves tracking labour hours using cost codes, which offer historical averages for installation times of specific components, such as raceways and supports. This data is essential for cost estimation and can be leveraged to enhance competitiveness in the market. For instance, historical averages can be compared with current rates to offer more competitive pricing.
Historical data also enables the establishment of production rates for specific tasks, which can be linked to a pay scale for workers. By analysing historical averages, employers can incentivise workers to meet or exceed production targets. Regular reviews, such as quarterly assessments, can be conducted, considering historical averages and individual performance. This approach promotes a performance-based culture, rewarding workers who consistently meet or surpass historical averages.
Additionally, historical averages can be used to assess the efficiency of different crew configurations. Factors such as crew size, experience, and work habits can significantly impact productivity. By comparing the performance of different crews against historical averages, it is possible to identify the most efficient team structures and work practices. This analysis can inform decisions about crew composition and work procedures to optimise productivity.
Historical data can also be a valuable tool for estimating labour costs in new markets. By comparing historical costs from similar projects, businesses can make more informed decisions about expansion into new markets. This ensures that cost estimates are realistic and aligned with market expectations, reducing the risk of cost overruns or inaccurate budgeting.
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Estimating software can save time
Estimating man-hours for electrical work can be a challenging and time-consuming task, but using estimating software can help streamline the process and improve accuracy.
RS Means is a well-known reference for estimating construction and electrical work, providing data on labor productivity, material costs, and other factors. Their online subscription service offers up-to-date information, with quarterly updates to reflect market changes. This can be a valuable tool for estimators, providing a reliable baseline to work from.
However, there are also specific software programs designed for estimating electrical work, such as Sage Estimating, which can integrate with RS Means data. These programs can save time by automating calculations, allowing users to input specific project details and quickly generate estimated man-hours.
For example, when estimating the man-hours for installing conduit, an estimator would traditionally consider factors such as the length of conduit, the type of conduit (metallic or non-metallic), the number of electrical runs, and installation standards. With software, these variables can be inputted quickly, and the program will apply built-in production rates, labor costs, and other factors to provide an accurate estimate.
Additionally, estimating software can help address the challenges of human estimation errors. As humans, we often struggle with accurately estimating large or complex tasks, and individual variability can lead to inconsistencies. Software provides a standardized approach, reducing the risk of errors and improving the accuracy of project timelines, budgets, and resource allocation.
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Frequently asked questions
A man-hour, also known as a Labor Unit or Person Hour, is the amount of work performed by an average worker in 60 minutes. It is used to estimate the total amount of uninterrupted labour required to perform a task.
To calculate man-hours, divide the minutes taken to perform a task by 60 (the number of minutes in an hour). For example, if a task takes 15 minutes, then it will take .25 man-hours.
The number of electricians required for a job will depend on the contract schedule, including the duration of the project and its phasing. Most days, you will only need a percentage of the total number of electricians calculated for the project.
RS Means is a company that publishes books and online data on labour productivity, material costs, and other factors relevant to commercial and residential construction. They are considered the golden standard for estimating reference.
Using RS Means online, you can calculate the crew labour hours per unit. You can also build crews and modify the suggested production rates to apply your individual labour costs.
