Construction historical data is something that is extremely essential for the accuracy of construction estimates. Sometimes, even the best estimators can make mistakes because the process of construction estimating is very extensive. Especially when the project size is large, there is a higher chance of making a mistake. Usually, the material takeoff is a step where there is a chance of missing something because a lot is going on during this step. So to prevent mistakes, historical data is used to confirm the results of the new estimation process.
Construction estimating services have become very common in the construction business. The reason is that their estimates are very accurate. Mistakes are common in the estimation process, but it is the job of the client to find a good estimator. Estimators can also be ranked based on their portfolios. Some are better because of their experience. While some can suit your project better because they have done a similar project in the past. The client should take this step seriously and visit multiple estimators before making a final decision. This article will discuss the role of historical construction data in cost estimation.
Construction Historical Data Explained:
It is all the data that is collected from the estimation of past projects. Whenever a project estimation is done, it is added to the data. It is important to keep a record of all the projects because they can always be used in the future.
For example, a residential project of same size in terms of area should be compared to a project from the past. The results should be similar because it is clear that past project has been through the entire process. So it has corrected estimates.
Typically, the historical data includes information like
● Material prices
● The material used
● The equipment cost and how long it was used
● Project duration and scheduling information
● Unexpected cost changes during construction
Importance of Construction Historical Data:
In construction management, it is very important for the cost estimates to be correct. The estimates should be flexible to go through some risky situations during the project. Change in material costs and labor costs often happen during projects, but every project is different and needs to deal with the situation differently. So using historical data can help you at so many levels, like deciding how to deal with a situation.
1. Better Cost Predictions:
By reviewing past projects, the estimator can make better decisions on how much material and labor will cost in the new project. And if any unexpected situation was encountered by the project in the past, it allows you to account for it in advance this time.
● If a certain material or service has a history of increasing cost, you can keep some margin in the budget for it. So if the price increases again, it does not harm the project.
2. Identify Cost Trends:
Historical data allows you to analyze cost trends of certain things over the years. You can find out how many times in the past the prices of materials for equipment rents increases. This way, the estimator can take reference from these past trends and generate new estimates accordingly.
How Estimators Collect Historical Data:
These days, everything is digitalized, and so are the past projects. The soft form of the project is available all the time on computers. Historical data is collected with
● Previous project cost reports
● Contractor invoices
● Purchase records
● Labor time sheets
● Payroll data
● Equipment usage reports
Also, many Construction Cost Estimation companies nowadays use software programs to do estimation. The software keeps a record of each project, which can be accessed easily. Through the record, you can find out every detail you need.
How Historical Data Improves Estimation:
● Construction Material Takeoff Services can use material pricing data from the past. This way, they can generate better estimates for the future by keeping some flexibility for seasonal price fluctuations in the budget.
● Risk assessment becomes better because almost similar types of risks are attached to every project. So you can plan the solution to the problem more efficiently.
● The financial risk in the project also reduces because you use new and old data to ensure that maximum risk is taken care of.
● The contractors can also benefit from the past projects because they already have a kind of roadmap to follow. Better estimation benefits a project in so many ways.
Conclusion:
Construction historical data has much more importance than anyone can think. By analyzing records from the past, the estimator is technically improving their accuracy. The difference between the old and new estimates clearly tells you something is wrong. And as far as the risks are concerned, they reduce significantly when you account for them in the new project. Every old project of a similar type helps the new project on so many levels. It is important to hire a good estimator who has past experience in many projects. This way, they will have experience and old records also.