It’s hard to say that Material takeoff brings 100% accurate. There is always going to be something missing or something that has been listed incorrectly. This can happen in both of manual work or even through computer estimation software.
Firstly, Although the information related to material is listed into the material takeoff but in actual, the cost of materials on the market may be changed and affected on your total estimate.In usually, you will have to spend more money to by the material because the market price of materials increase. This is one of the things that the Material takeoff cannot control.
Secondly, the external factors like the weather or the temperature… may damage your materials. It can be said that this is an unexpected thing but often happens and directly affects to contractors. Material takeoff can only synthesize objects on the initial drawing and give contractors an overview of the total amount of materials and the initial cost. Arising from the spoilage of the materials make them buy more to compensate for the loss. Then, they need to have more people synthesizing or a software to be able to store new data after the implementation process.
Besides, there are other factors such as changing kinds of materials against the initial estimation in the later development stage because in some cases can not be unforeseen and the original design drawing is not possible to help you compute this. So, In addition to based on Material takeoff, contractors should review these script before preparing a final bid for any project.
Regardless of all these factors, Material takeoff is still a indispensable part before you build anything or take on any project. It may not be completely accurate but it is the starting point that gives you an overview to estimate the amount of material and the cost required for your project. A pre-planned project is bound to be profitable for your business in every way.