Activities

CTC-415

Activity

• Consumes Time

• Usually consumes resources (cure time for concrete)

• Definable start and finish

• Assignable – V. important – who is responsible

• Measurable – progress – amount done

Activity Categories– Admin

• Notice to proceed• Permits• Tech info • Contract• Modifications• Acceptance of work• Corrective work for completion• Final accounting of quantities• Inspection/certification• Submit O&M manuals• Warranties and guarantees

Activity Categories

– Mobilization/Demobilization• Field office

• Roads

• Access area

• Fencing

• Utilities

• Get labor and train

• Get equip

• Site surveys

Activity Categories

– Procurement• ID types and quantities of materials and equipment

• Shop drawings

• Design cost material

• Shipping and delivery

Activity Categories

– Construction• Start-up Testing

• Testing systems

• Balance HVAC

• Flush and clean H2O system

• Test safety equipment

Activity ID

• Need to know what needs to be done for contract– What is work?– Where is it done?– Who is responsible?– When will it be performed?– How will it be accomplished?

Activity Detail

• How detailed should the Activity be?– Depends on schedule type

– Complexity

– Contractor’s management philosophy

– Summary schedule vs. day to day

– What is known about project when scheduled?

– Who does work?

– Will more or less detail affect usefulness or accuracy or schedule?

Activity ID

• Planning Process has 3 steps:– ID Individual work items– Estimate time to complete based on available

resources and work environment– Plan the sequencing items given physical

resources, safety and preferential consideration

• Milestone – - Marks the events in the project – not an

activity

Work Breakdown Structure (WBS)

• Framework for organizing and ordering activities

• Does not address scheduling

• Used as planning tool

• Uses CSI structure – same as Means

Activity Description

• Concise and unambiguous

• Scope and location of work

• Must be understandable, consistent in format 

• Activity Responsibility – Who is responsible?

Activity Duration

• How long to complete activity

• Summary Schedule– Years – Preliminary or Phased Development– Months – Preliminary of Design Milestones– Weeks – Framework for Detailed Schedule

Activity Duration

• Master Construction Schedule

– Days – Most common – allows start and finish by calendar days

– Hours – Short duration or involve shutdown of a system which must be working by next work day

– Must select time unit based on who is using– Must use same unit throughout schedule

Estimating Duration

• Duration = Work Quantity/ Production Rate• Work Quantity

– all work necessary to complete activity (sq ft, lf, cy)

• Production Rate– Ave daily production rate based on work environment

and available resources - includes idle and work time and setup/breakdown

– How do you determine the production rate?

Resources

• Labor

• Equipment

• Materials

• Subs

• Suppliers

Factors Affecting Productivity• Nature of work

– Repetitive?– Learning curve

• Labor and Equipment Productivity– Labor training– Experience– Motivation– Restrictions– Equipment operator skill– Maintenance policy– Age– Site conditions

Factors Affecting Productivity

• Management Skill– Plan, organize and execute work – Effective use of resources can impact Activity

Duration

Factors Affecting Productivity

•   Material Availability– Must have enough to do the job– But do not want a large inventory– Supplier needs to be able to supply site with

enough material for crews

Factors Affecting Productivity

• Seasonal Conditions– Productivity drops with temp change from

70degrees

• Work Restrictions– By contract– Local custom– Labor agreement– Physical condition

Factors Affecting Productivity

• More Work Restrictions– Hours of day when work can be done

– Material delivery and movement restrictions

– Security req for labor

– Load limits on floors and elevators

– Zoning ord that restricts construction facilities

– Provisions in labor agreement

– Building codes

– Safety req for protecting public and workers

Factors Affecting Productivity

• Quality of work– Higher quality – longer duration

•  Concurrent Activities– How many other activities are going on around

you?– Interference slows production

Factors Affecting Productivity

• Source of Quantity and Production Data– Takeoffs

– Bid Estimate

– Experience

– Outside Info

– Guides

– Ind & Trades Org

– Manufacturers, Fabricators and Suppliers

– Specialty contract