Glossary - Construction Project Scheduling and Control - page 490

the cost and schedule, unrealistic expectations, decentralized decision making,
and/or other factors. It usually results in negative consequences to the owner,
including the reduction of the value obtained in the project.
Sequestering the Float —Eliminating or reducing the float of an activity or activities
by inflating durations, inserting unnecessary logic relationships, inserting
unnecessary lags, or a combination of these procedures. This is a technique
practiced by some contractors in order to maintain inconspicuous ownership of
the float. Most owners dislike this practice and disallow it by inserting a “no
sequestering the float” clause in the contract.
Settlement —An agreement by which the parties consent to settle a dispute between
them.
Shop Drawings —Shop Drawings are drawings, diagrams, schedules, and other data
specially that are prepared for work by the contractor or a subcontractor,
sub-subcontractor, manufacturer, supplier, or distributor to illustrate some
portion of the work. The purpose is to demonstrate the way in which the
contractor proposes to conform to the information given and the design concept
expressed in the contract documents (AIA).
Single-Restricted Float —Activity float that is restricted from its start or finish, not
both. See Start-Restricted Float and Finish-Restricted Float .
Slack —See Float .
Soft Logic —See Resource Constraint .
Standard Normal Distribution —A normal distribution with the parameters mean,
μ=0 and standard deviation, σ=1. The random variable for this distribution is
denoted by Z .The z -tables (values of the random variable Z and the
corresponding probabilities) are widely used for normal distributions.
Start Milestone —An event marking the start of an activity with special significance,
such as notice to proceed (NTP).
Start-Restricted Float (in Precedence Networks) —The amount of time we can
delay the rest of the work in an activity after it has started on its critical start
date, without delaying the entire project.
Start-to-Finish (SF) Relationship —A logic restraint that does not allow for the
start of one activity (the successor) until another activity (the predecessor) is
completed.
Start-to-Start (SS) Relationship —A logic restraint that does not allow for the start
of one activity (the successor) until another activity (the predecessor) has started.
Status date —See Data Date .
Store Period Performance —A function in Primavera software that adds the latest
“Cost this Period” to the “Cost to Date,” and then makes “Cost this Period”
zero. This is a practice the scheduler has to do every time there is a schedule
update, along with a Payment Request .
Stretchable Activity —An activity with a flexible duration that increases or decreases
to accommodate the amount of available resources or other restrictions. The
activity duration of a stretchable activity is determined by the CPM calculations
based on the user's resource and/or other restrictions.