CEM 100 Exam 3 Questions with Correct
Answers
The Critical Path method(CPM)
Procedure that involves the analysis of the sequence and time characteristics of projects by
the use of networks and is used for construction time control, and contractors are now
frequently required by contract to apply network methods to the planning and scheduling of
their fieldwork
Project planning
Devising of a workable scheme of operations to accomplish an established objective when
put into action
Project Planning factors
Different areas of responsibility, such as subcontracted work, which are distinct and separate
from work being done by the prime contractor directly, different categories of work as
distinguished by craft or crew requirements, different categories of work as distinguished by
equipment requirements, different categories of work as distinguished by materials such as
concrete, lumber, or steel, distinct and identifiable subdivisions of structural work such as
walls, slabs, beams, and columns, Location, owner's breakdown for bidding or payment
purposes, contractor's breakdown for estimating purposes
Precedence notation
Depicts each activity as a rectangular box, connected to other activities(boxes with arrows)
Precedence diagram
,Key to the entire time control process that requires time, work, and experience with the type
of construction involved
Network format
Illustrates the manner in which the constituent activities are joined together to create a total
operation pattern
Project scheduling
Accomplished by carrying out a series of simple computations that yield valuable project
control information
Activity durations assumptions
Each activity be evaluated independently of all others, For each activity: assume a normal
level of labor and/or equipment, a normal workday or workweek, and activity durations must
be estimated without regard to any predetermined contract completion date
Time contingency
Safety factor must be included in project time estimates to make allowance for possible
project disruptions, Not allowed for individual activities to allow for unforseen project delays
caused by fire, accidents, equipment breakdown, strikes, late material deliveries, difficult site
conditions, flood, legal delays, and other disruptions
Network computations
After duration is determined has been estimated for each activity some simple step by step
computations are performed
Total float
, The time leeway in the scheduling of some activities and none at all in the scheduling of
others(Calculated by subtracting the ES from LS or EF from LF)
Critical Path
A critical activity is quickly identified as one whose two start times at the left of the activity
box are equal as well as the two finish times at the right of the activity box
Free float
Category of spare time that is derived from the network schedule(Calculated by subtracting
its early finish time from the earliest start time of the activities directly following)
Least-cost project shortening
To reduce length of critical path: do critical activities parallel to each other instead of in a
sequence
Time-scaled networks
Provides a graphical portrayal of the time inter relationships among activities as well as their
sequential order
Bar charts
Graphical picture of the jo schedule, showing the early start and early finish times of various
project segments plotted to a horizontal time scale
Resource scheduling
Resource include materials, subcontractors, labor crews, and equipment
Progress monitoring
Answers
The Critical Path method(CPM)
Procedure that involves the analysis of the sequence and time characteristics of projects by
the use of networks and is used for construction time control, and contractors are now
frequently required by contract to apply network methods to the planning and scheduling of
their fieldwork
Project planning
Devising of a workable scheme of operations to accomplish an established objective when
put into action
Project Planning factors
Different areas of responsibility, such as subcontracted work, which are distinct and separate
from work being done by the prime contractor directly, different categories of work as
distinguished by craft or crew requirements, different categories of work as distinguished by
equipment requirements, different categories of work as distinguished by materials such as
concrete, lumber, or steel, distinct and identifiable subdivisions of structural work such as
walls, slabs, beams, and columns, Location, owner's breakdown for bidding or payment
purposes, contractor's breakdown for estimating purposes
Precedence notation
Depicts each activity as a rectangular box, connected to other activities(boxes with arrows)
Precedence diagram
,Key to the entire time control process that requires time, work, and experience with the type
of construction involved
Network format
Illustrates the manner in which the constituent activities are joined together to create a total
operation pattern
Project scheduling
Accomplished by carrying out a series of simple computations that yield valuable project
control information
Activity durations assumptions
Each activity be evaluated independently of all others, For each activity: assume a normal
level of labor and/or equipment, a normal workday or workweek, and activity durations must
be estimated without regard to any predetermined contract completion date
Time contingency
Safety factor must be included in project time estimates to make allowance for possible
project disruptions, Not allowed for individual activities to allow for unforseen project delays
caused by fire, accidents, equipment breakdown, strikes, late material deliveries, difficult site
conditions, flood, legal delays, and other disruptions
Network computations
After duration is determined has been estimated for each activity some simple step by step
computations are performed
Total float
, The time leeway in the scheduling of some activities and none at all in the scheduling of
others(Calculated by subtracting the ES from LS or EF from LF)
Critical Path
A critical activity is quickly identified as one whose two start times at the left of the activity
box are equal as well as the two finish times at the right of the activity box
Free float
Category of spare time that is derived from the network schedule(Calculated by subtracting
its early finish time from the earliest start time of the activities directly following)
Least-cost project shortening
To reduce length of critical path: do critical activities parallel to each other instead of in a
sequence
Time-scaled networks
Provides a graphical portrayal of the time inter relationships among activities as well as their
sequential order
Bar charts
Graphical picture of the jo schedule, showing the early start and early finish times of various
project segments plotted to a horizontal time scale
Resource scheduling
Resource include materials, subcontractors, labor crews, and equipment
Progress monitoring
