Practices for Establishing Contract Completion Dates for Highway Projects (2017) / Chapter Skim
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Pages 22-30
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From page 22... ...
22 Following initial analysis of the survey results, several states were identified for potential follow-up discussions with the purpose of gleaning additional details and depth regarding their practices in developing estimates of contract time. The criteria used to select these STAs involved their willingness to participate in follow-up interviews and how they responded to specific questions of the survey.
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From page 23... ...
23 OKLAHOMA CONTRACT TIME DETERMINATION PROCEDURE The procedure in use at the Oklahoma DOT is an example of the type of integrated automated scheduling procedure in place at many STAs. This procedure uses a custom developed user interface and a Microsoft Access database (Figure 22)
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FIGURE 21 Screenshot for Primavera scheduling template.
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FIGURE 22 Screenshot for Microsoft Access quantity input.
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FIGURE 23 Screenshot for Microsoft Project schedule output.
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27 – Guardrail – Intersections – Landslide/drainage repair – Lighting – Maintenance – Major construction – Minor rehabilitation – Minor rehab -- General systems – Noise walls – Other – Pavement markings – Resurfacing – Signals – Signing – Widening. A unique regression equation was developed for each of the 19 project types.
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From page 28... ...
28 Contract times for projects greater than $1,000,000 are estimated using the large project tool. The large project duration estimate tool is based on a multivariate regression model for five different project types (Table 4)
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29 FIGURE 25 Screenshot of KTC title page. FIGURE 26 Screenshot for open access calculation.
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30 and calculation sheet (other project types are similar)
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