(redirected from pertly)
Also found in: Dictionary, Thesaurus, Medical, Legal.


(systems engineering)
A management control tool for defining, integrating, and interrelating what must be done to accomplish a desired objective on time; a computer is used to compare current progress against planned objectives and give management the information needed for planning and decision making. Derived from program evaluation and review technique.


An acronym for program evaluation and review technique; a planning, scheduling, and control procedure based upon the use of time-oriented networks which reflect the interrelationships and dependencies among the project tasks (activities). The major objectives of PERT are to give management improved ability to develop a project plan and to properly allocate resources within overall program time and cost limitations, to control the time and cost performance of the project, and to replan when significant departures from budget occur.

The basic requirements of PERT, in its time or schedule form of application, are:

1. All individual tasks required to complete a given program must be visualized in a clear enough manner to be put down in a network composed of events and activities. An event denotes a specified program accomplishment at a particular instant in time. An activity represents the time and resources that are necessary to progress from one event to the next.

2. Events and activities must be sequenced on the network under a logical set of ground rules.

3. Time estimates can be made for each activity of the network on a three-way basis. Optimistic (minimum), most likely (modal), and pessimistic (maximum) performance time figures are estimated by the person or persons most familiar with the activity involved. The three-time estimates are used as a measure of uncertainty of the eventual activity duration.

4. Finally, critical path and slack times are computed. The critical path is that sequence of activities and events on the network that will require the greatest expected time to accomplish. Slack time is the difference between the earliest time that an activity may start (or finish) and its latest allowable start (or finish) time, as required to complete the project on schedule.

5. The difference between the pessimistic (b) and optimistic (a) activity performance times is used to compute the standard deviation () of the hypothetical distribution of activity performance times [= (b - a)/6]. The PERT procedure employs these expected times and standard deviations (σ2 is called variance) to compute the probability that an event will be on schedule, that is, will occur on or before its scheduled occurrence time.

In the actual utilization of PERT, review and action by responsible managers is required, generally on a biweekly basis, concentrating on important critical path activities. A major advantage of PERT is the kind of planning required to create an initial network. Network development and critical path analysis reveal interdependencies and problem areas before the program begins that are often not obvious or well defined by conventional planning methods.

program evaluation and review technique (PERT)

A management control technique applied to building construction; determines what must be done to complete construction by a given date. Current construction progress is monitored on a computer and compared with the planned schedule so as to provide a management tool for further planning and decision making.


1. Acronym for “project evaluation and review technique.”


References in periodicals archive ?
As they pertly lift their knees in the polka or imitate the gestures of the performing dolls, one notices them not just because they are cute, but because they are meaningful.
I got myself a nifty thumbnail specimen of a ruby spinel crystal pertly perched on matrix, from Pein Pyit, Myanmar (Burma).
Susannah Waters made a totally credible boy Cherubino; Linda Tuvas offered a pertly attractive Barbarina, Ryland Davies was amusing as Don Basilio and Don Curzio, Susan McCulloch provided a genial Marcellina, while Ettore Fissore, another Glyndebourne veteran, returned as Don Bartolo.
Renoir's Two Sisters emerge pertly from a rain of blue and pink pastel-strokes.
On Monday we had Cherie Lunghi as the pertly pretty, self-assured and rather flighty Francoise, discussing her eight-year stint as Picasso's mistress.
More of them, this time, are clearer and more deeply purple in the "good" zones, and they still sit up pertly on their flat shaly matrix.
Cast as the budding feminist, Desiree pertly bounces from dutiful daughter to housewife to (household) engineer, while Willy Shives, a versatile performer, is appropriately supportive as her husband.
Inspired performances from oboe, flute and celeste were central to a mellow interpretation of Venus's peace and to a pertly playful Mercury, while the boisterous, broad jollity of Jupiter left it mercifully free of later, patriotic associations.
A sexy and wickedly amusing celebration of women's "batties," a Jamaican term for buttocks, the dance documents the voluptuous jiggle along with the pertly prim twitch.
A triangular sail of crackling stood pertly beside a timbale of shoulder meat suffused with concentrated porkiness.
You are no one unless you are on television," her character says pertly as she plots the death of her husband with a local hoodlum in an at tempt to build the perfect TV life for herself.