Why it is importanat to under take site investigation prior to construction works?

it will help the project set-up team to be aware about site details like,

- available resources

- site conditions

- urgent requirements of materials and equipment

- it will shape the start-up plan and will help shaping the construction sequence

It is very important because you need to know factors that affect the construction process like soil investigation, area location, access and other observations. From these factors you can make plan on how to deal with it to avoid delay due to this problems once you started the construction phase.