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Estimating From the Model

Estimating From the Model. Kevin R. Miller BYU Construction Management. Estimating today. When was the last time you estimate a set of plans that were 100% How long did it take you to do the takeoffs?. Risk. Who bears the risk today if the plans aren’t complete?

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Estimating From the Model

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  1. Estimating From the Model Kevin R. Miller BYU Construction Management

  2. Estimating today • When was the last time you estimate a set of plans that were 100% • How long did it take you to do the takeoffs?

  3. Risk • Who bears the risk today if the plans aren’t complete? • How do you cope with plans that aren’t complete? • Hard Bid • Negotiated, Design-Build

  4. Benefits of Takeoff Process (Traditional Plans) • Become familiar with the project • Find problem areas and identify risk and constructability issues • Value engineering

  5. Down side of Takeoff(Traditional Plans) • Time consuming (Detailed Estimates) • May miss something • Transferring quantities from takeoff sheets to Estimating software tedious and non productive

  6. What do we want from the Model? • Accurate quantities • Less takeoff time • Better visualization of project • Subs to understand the project and their scopes. • Competitive edge • Clash detection • Visual means to communicate to clients

  7. General Sales Pitch • Push the button. • Costs are generated. • The 4/5 D model is generated. • All the work is done. • Looks good, sales software. • Not necessarily doable without a LOT of extra work.

  8. Model World Today • Not the magical pushing a button and the estimate is done. • No such thing as a 100% Model • Costs come from your estimating database not Means or some other source • The liability that exists with 2D drawings exist with 3D models • With BIM – Risk shouldn’t change or shift

  9. Models cont • Takeoffs consume less time • More time verifying what is modeled is constructable • Better understanding of design intent

  10. Estimating from the Model or Not? • Do I really want to work from the Model? • No, I want static drawings that don’t change so there is an accurate history of the costs for the project • No, I don’t want the potential to change the drawings because I’m and estimator, not a modeler • No, the file size of the model would really slow me and my computer down. • DWF file (a read-only copy of the model) addresses the above concerns

  11. What can we really get from the Model? • Counts • Lengths • Areas • I have concerns about the wall areas and volumes • Use Length * Height for areas • Use Length * Height * Width for volumes • When in doubt, check the quantity calculation.

  12. Timberline/MC2 Opportunities • QTO integrates seamlessly into Timberline. • QTO integrates with MC2. • Use Timberline/MC2 for complete estimates instead of jumping to Excel (Conceptual/Budget not Bid day) • Cleanup and optimize the estimating DB • Too much legacy junk in estimating DB’s • Every item in the DB should have a formula in order to link • QTO integrates better with Timberline than Timberline does

  13. What is needed to Estimate From the Model • 3D model • 2D modeled sheets • Allows you to perform takeoff for the things not modeled. • DWF file format • May use PDF, jpg etc files but they will not link to the 3D model.

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