Highlights
This assignment requires you to prepare estimates for two alternatives:
Alternative 1: This estimate uses time and cost information from a similar project done some years earlier. Those costs are to be escalated to today’s dollars to indicate what such a project would cost today if the same construction technique was used.
Alternative 2: You are to prepare a new estimate, in today’s dollars, using more specialised equipment that is now available to your company. Both projects are for excavation of 25 km of trench, and the laying of concrete pipes (supplied and delivered by others) in the excavated trench. Backfill will be by others and will not form part of the estimates. (Examples of excavators and equipment referred to in this assignment are illustrated on the last three pages of this assignment question).
You will compare the benefits of each of the two estimates for cost and practicability and make a recommendation to your manager as to which is the better approach to use. A written report (summary) of no more than one half A4 page is to be part of your evaluation for this assignment submission.
Alternative 1: Previous Project Cost Information
Below is a breakdown of time and cost to excavate and lay a 25 km water supply pipeline taken from records of a project your company completed three years ago. You are to escalate the relevant costs from that project to bring them up to present day values. Inflation indices obtained from Australian Bureau of Statistics indicate an average 6% p.a. increase for that period. You will use that escalated cost to compare the estimated cost of doing a similar project now, using the same construction technique as in the previous project. That project encountered a total of five days of wet weather.
When that was constructed your company was smaller and did not have access to a specialised trenching machine or a rough terrain crane. Trenching for that project was done with a Backhoe that dug the required length of trench each day. After the crew finished their shift the backhoe was used for two hours each day to transport pipes from the stockpile and place them alongside the trench ready for laying. The next day the pipe laying crew lowered and positioned the pipes using shear legs mounted over the trench.
Assignment Submission Requirements
Use the methods outlined above to set up spreadsheets and give answers to items detailed in subheadings a) to h) above for both alternatives.
Prepare a brief report (approximately half A4 page) to your General Manager setting out the advantages/disadvantages of the alternatives and your conclusions regarding the suitability of either Alternative 1 or 2, together with your recommendation for either one to be included in the tender this work.
You are to submit both the report and your excel calculation files.
Assignment Presentation
See learning materials on Canvas for the face sheet to be used for all assignments. Submit both a .PDF print report and the original excel and word documents used to generate the report.
Be careful to submit your assignment files in such a way that that they can be easily read and printed, without spreadsheets having to be increased or reduced in size or information scattered over many sheets. For Excel see chapter 11 for the required professional practice including STQ11.10 for footers on the bottom of each sheet. Complete files are required to be presented in a professional manner as you would produce for your manager. Files should be logically ordered so that the information in them can be easily printed, understood and conveniently accessed. Sloppy work will lose you marks.
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