Analysis and Control of Production Costs

Please refer to the instruction sheet attached. Please note that all references need to be to UK construction bodies/industries.
work needs to be in report format.
The Assignment Question below:
In producing an estimate the contractors estimator will use a variety of sources of information to ensure that the estimate of cost is as realistic as possible.
Discuss, using examples, the sources of cost data that could be available to assist in producing a cost estimate at tender stage
Your assignment should not exceed 1500 words
Marking Scheme
Identification of sources of cost data
Discussion of sources of cost data
Use of examples
Presentation and referencing