project construction schedule review
TRANSCRIPT
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Project Construction Schedule Review October 14, 2020
Project Construction Schedule ReviewBuilding the Texas Transportation System
October 14, 2020
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Project Construction Schedule Review October 14, 2020
Why do we even need a schedule?
▪ It causes more effort to be expended on planning the execution of the project
▪ It allows the project status to be known from project start to end
▪ It leads to better outcomes
▪ How do we get the best possible schedule?
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Project Construction Schedule Review October 14, 2020
TxDOT Requirements for Schedules
▪ Defined in 2014 Standard Specs in Item 8
– Defaults to a barchart schedule
– CPM if shown on plans (usually under Item 8 in the General Notes)
– Best Practice require compatibility with Primavera P6 in the General Notes
▪ Required Submittals
– Baselines
– Monthly Updates
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Project Construction Schedule Review October 14, 2020
Baselines
▪ Submittal timeline
– Preliminary Schedule required 7 calendar days before the Precon
– Detailed Baseline submitted within the first 45 calendar days
– Acceptable Baseline before the 90th calendar day
▪ How to meet these deadlines
– Make it clear from the beginning quality and timely schedule submittals are important
– Encourage Contractor to get started, identify scheduler
– Make schedule a line item on partnering meeting agendas
– Send formal correspondence on non-conformance
– Partner with the Contractor, focus on important issues
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Project Construction Schedule Review October 14, 2020
Baselines - Barcharts
▪ Reviewing Barchart Baseline Schedules
– Meets contract time
– All work is included
– Conforms to the Traffic Control Plan
– Traffic shifts are clearly identified
▪ Common Issues
– Exceed contract time
– Lack of detail
– Traffic shifts not clear
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Project Construction Schedule Review October 14, 2020
Baselines - CPM
▪ For CPM projects we always use a checklist
– Meets contract time
– Conforms to the Traffic Control Plan
– Traffic shifts are clearly identified
– Concise activity descriptions
– Correct calendars
– “Level of Effort” activities for overall contract time and milestones
– Uses “hard” logic
– Provides quantities and production rates
• Best Practice provide in “User Defined Fields”
– Clearly defined critical path
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Project Construction Schedule Review October 14, 2020
Baselines - CPM
▪ Common Issues
– Concise activity descriptions
– Correct calendars
– “Level of Effort” activities for overall contract time and milestones
– Relies on “hard” logic not “soft” logic
– Provides quantities and production rates
– Contrived critical path
– Verify post-letting ROW and utility clear dates in PS&E are accounted for
▪ Review Techniques
– Add a “user defined field” and use it to filter and display particulars
– For very large projects, after getting familiar with the overall project take a deep dive into a particular construction sequence
– Perform a “backward pass” review
– Partner with the Contractor’s scheduler
– If there are major issues, identify and return as quickly as possible
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Project Construction Schedule Review October 14, 2020
Updates
▪ Update reviews for Barchart Schedules
– Look for added activities
– Compare Finish Date
– Compare traffic shift dates
– Compare critical path and access critical path progress
▪ Review workflow
– Populate Project Schedule Summary Report (PSSR)
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Project Construction Schedule Review October 14, 2020
Updates
▪ PSSR
– One line for each
schedule submittal
– How we are doing
versus the contract
– What happened and
why
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Project Construction Schedule Review October 14, 2020
Updates
▪ Populate PSSR from CPM schedules
–
– Contract time calendar must be updated each period to reflect actual days
charged
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Project Construction Schedule Review October 14, 2020
Updates
▪ For CPM – Key Items
– Monthly submittal no later than the 20th calendar day of the following month
• Best Practice is to reduce to 10th calendar day in general notes
– PDF’s of critical path and of all activities
– Not a revision or a time impact analysis
▪ Review workflow
– Upload Schedule and recalculate
– Review the schedule log
– Populate PSSR
– Run schedule comparison program like Claim Digger
• Another option is Change Inspector which compares XER files
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Project Construction Schedule Review October 14, 2020
Updates
▪ Schedule Comparison to previous period
▪ Most important changes to review
– Added/Deleted Activities
– Added/Deleted Relationships
– Duration/Description Changes
– Actual Date Change
– Progress Change
▪ Did changes affect critical path?
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Project Construction Schedule Review October 14, 2020
Updates
▪ Evaluate critical path
– Graphically analyze any change from pervious period’s critical path
– Flag previous critical path in “user defined field”
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Project Construction Schedule Review October 14, 2020
Updates
▪ Common Issues
– Contract time calendar has been updated for
correct days charged
– Progress is accurate
– Original Duration changes
– The update is actually a revision or impacted
schedule
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Project Construction Schedule Review October 14, 2020
Updates
▪ Note explaining gain or loss of time
– Use previous update as baseline
– Show previous month graphically for comparison
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Project Construction Schedule Review October 14, 2020
Updates
▪ Retain prior critical path graphics in checklist reports.
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Project Construction Schedule Review October 14, 2020
Updates
▪ Controversy…
– Schedule Revisions
• Based on most recent update, Not last update submitted
• Must have unrevised update with the same data date to make proper
comparison
– Impacted update schedules
– Failure to make corrections
– Out-sequence-progress
– Recovery Schedules
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Project Construction Schedule Review October 14, 2020
Updates
▪ Report will provide:
– Summary in transmittal email with recommended action
– Draft letter
– Checklist with notes
– Barchart of critical path
– Barchart of all activities
– Barchart showing progress in period
– Earned Value progress curve
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Project Construction Schedule Review October 14, 2020
Updates
▪ Earned Value progress curve
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Project Construction Schedule Review October 14, 2020
TIA’s
▪ Time Impact Analyses (TIA)
– Identify issue and responsibility
– Create documents and correspondence for future use
– Determine when impact began (Step 1)
– Determine when impact ended (Step 4)
– Don’t rely on a predicted impact (Step 2)
– Pictures are very helpful, if we think something might become an issue, take
pictures and save them where they can be found
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Project Construction Schedule Review October 14, 2020
P6 Setup
▪ Stand alone versus Server Setup
– Stand alone preferred for schedule reviews
– Portable databases
– Ability to create separate databases for each project
– Avoid contamination of Global codes and calendars
▪ Other options
– Use third party programs that create barcharts from XER files directly
▪ XER file issues
– POBS now remedied
– Risktype – Go into XER and delete that section
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Project Construction Schedule Review October 14, 2020
In Conclusion
▪ Project Scheduling is valuable tool because it benefits:
– Contractor – better planning, likely to increase profit
– TxDOT – more information, less likely to pay for unwarranted claims
– Traveling Public – reduced construction cost and construction time
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