Reviewing & Analyzing Schedule

1. Reviewing & Analyzing Schedule CTC-415

2. Reviewing the Schedule • Is Schedule complete • Are Activity Duration Reasonable • Are Activity Relationships Complete • Are Activity Relationships Valid • Is Project Calendar Correct • Is Schedule Duration within Contract Time • Are Contractual Milestones Met

3. Analyzing the Schedule • Is Critical Path Reasonable • Are there Multiple Critical paths • What Activities are Near Critical • How does Work Flow • Are there Conflicts Among Concurrent Activities • Is there an Excessive amount of Work at any Time

4. Updating Schedule • Frequency • Depends on • Complexity • More complex -> more updates • Unexpected events • Update after event to determine new completion date • Helps team evaluate strategies to mitigate impacts • When specified • By contract documents

5. Updating Schedule • How • Gather Activity Status Info • Update Date – when the info is gathered • Activity status • Actual start date – meaningful work begins • % complete • Work in place -> work in place/planned work quantity • Time expended -> time expended/ planned duration (only good for time dependent activities like concrete curing) • Cost Incurred - >cost incurred/planned cost (depends on actual resource productivity being constant and resource costs not varying) • Resource used -> Resource Used/Planned resource amount

6. Updating Schedule • How • Activity status • Remaining duration – Remaining Work quantity/Anticipated Productivity • Actual finish date – all completed activities • Provides data for future jobs • Gathering Data • Direct observation, Update meetings, field reports, turnaround reports, photos and videotape

7. Modify and Revise Schedule • Revise network logic • Change duration to meet contracted completion • Reflect changes in planned means and methods for completing activity • Shift activity to better time (summer for concrete)

8. Modify and Revise Schedule • Revise Activity Durations • Planned quantity of work has changed • Amount of resources has changed • Productivity is either higher or lower than planned • Add & Delete Activities • Scope of work changed • Activities divided into smaller activities

9. Review and Analyze Schedule • Make sure new schedule does not contain errors • Implement updated schedule

10. Analyzing Schedule Status • What is the basis for evaluating schedule status? • Usually the original schedule is the baseline • What is planned completion date • Is updated schedule completion date same as baseline • If not – why not (is there an error)

11. Analyzing Schedule Status • Has the critical path shifted? • If so – why • Are CP activities really “critical” • Has the float changed on any activities? • Has weather become a factor for any activity • Are there trends worth watching • Any changes since last update?

12. Out of Sequence Work • Why? • Keep crews busy • Preparatory work starts early • Gives crew a chance to test means and methods • Preserve Schedule Logic • Shorten successor activity caused by out of sequence work • Keep all other logic intact

13. Value Engineering • Provides alternatives to the proposed design • Save Owner $$ • Must be as good or better than original design • Must save enough $$ so that contractor can recover his cost of doing VE • Usually comes from contractor’s or engineer’s previous experience

14. Value Engineering • Can save $$ either due to savings in time or materials • Ex: Composite Wall and roofs • Material cost per sf is higher than regular roof • Labor cost is lower • Requires a crane

15. Value Engineering • Ex: • Replace infiltrators with Eljen In drains • System size is reduced to 50% • Also reduces amount of sand, clay, topsoil • Reduces dozer time and installation time • In-drain costs about 2x infiltrator