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?
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