A PERT activity cannot be performed until the predecessor event has occurred.

* Lead time: the time by which a predecessor event must be completed in order to allow sufficient time for the activities that must elapse before a specific PERT event reaches completion.

* lag time: the earliest time by which a successor event can follow a specific PERT event.

It has been utilized in PERT, critical path method ( CPM ) and other project management / control systems to describe the statistical distributions of the time to completion and the cost of a task.

This is in contrast to the more traditional critical path and PERT methods, which emphasize task order and rigid scheduling.

People claim Goldratt's books fail to acknowledge that TOC borrows from more than 40 years of previous management science research and practice, particularly from PERT / CPM and JIT.

When combined with a scheduling methodology such as Program Evaluation and Review Technique ( PERT ) or the Critical Path Method ( CPM ), milestones allow project management to much more accurately determine whether or not the project is on schedule.

PERT network chart for a seven-month project with five milestones ( 10 through 50 ) and six activities ( A through F ).

* Two consecutive events in a PERT chart are linked by activities, which are conventionally represented as arrows ( see the diagram above ).

The original concept was called PERT / COST, but it was considered overly burdensome ( not very adaptable ) by contractors who were mandated to use it, and many variations of it began to proliferate among various procurement programs.

And the " Program Evaluation and Review Technique " or PERT, was developed by Booz Allen Hamilton as part of the United States Navy's ( in conjunction with the Lockheed Corporation ) Polaris missile submarine program ; These mathematical techniques quickly spread into many private enterprises.

Planning and feedback loops in Extreme programming ( XP ) with the time frames of the multiple loops. In critical studies of project management it has been noted that several PERT based models are not well suited for the multi-project company environment of today.

PERT was introduced by the U. S. Navy in 1957 to support the development of its Polaris missile program.

While the term " work breakdown structure " was not used, this first implementation of PERT did organize the tasks into product-oriented categories.

By June 1962, DoD, NASA and the aerospace industry published a document for the PERT / COST system which described the WBS approach.

File: 5n PERT graph with critical path. svg | PERT chart

* A PERT chart is often used in project management.

Application of CCPM has been credited with achieving projects 10 % to 50 % faster and / or cheaper than the traditional methods ( i. e. CPM, PERT, Gantt, etc.

* Project management as an area of inquiry and an object of much scrutiny, leading up to the modern concept of project management and standardized project models such as the DoD Program Evaluation and Review Technique, PERT, invented for Polaris.

Similar problems of task ordering arise in makefiles for program compilation, instruction scheduling for low-level computer program optimization, and PERT scheduling for management of large human projects.

The Program ( or Project ) Evaluation and Review Technique, commonly abbreviated PERT, is a statistical tool, used in project management, that is designed to analyze and represent the tasks involved in completing a given project.

PERT is a method to analyze the involved tasks in completing a given project, especially the time needed to complete each task, and to identify the minimum time needed to complete the total project.

PERT was developed primarily to simplify the planning and scheduling of large and complex projects.

An example of this was for the 1968 Winter Olympics in Grenoble which applied PERT from 1965 until the opening of the 1968 Games.

DuPont's critical path method was invented at roughly the same time as PERT.

* A PERT chart is a tool that facilitates decision making.

and ( 3 ) in so doing, frees itself to give appropriate emphasis to the event Jesus Christ by means of statements that, from Bultmann's point of view, are mythological.

In the 2008 book The Star-Spangled Banner: The Making of an American Icon, Smithsonian experts point out that accounts of the event appealed to Americans eager for stories about the revolution and its heroes and heroines.

Around a black hole there is a mathematically defined surface called an event horizon that marks the point of no return.

This was not the first appeal but some have seen the murder of the legate as a turning point in papal policy — whereas it might be more accurate to see it as a fortuitous event in allowing the Pope to excite popular opinion and to renew his pleas for intervention in the south.

Because of the world's absurdity, at any point in time, anything can happen to anyone, and a tragic event could plummet someone into direct confrontation with the Absurd.

In this interpretation every event is a branch point ; the cat is both alive and dead, even before the box is opened, but the " alive " and " dead " cats are in different branches of the universe, both of which are equally real, but which cannot interact with each other.

In linguistics, the grammatical aspect of a verb is a grammatical category that defines the temporal flow ( or lack thereof ) in a given action, event, or state, from the point of view of the speaker.

Hobart is the finish point of the Targa Tasmania rally car event held annually in April since 1991.

Given these two assumptions, the coordinates of the same event ( a point in space and time ) described in two inertial reference frames are related by a Galilean transformation.

Her rage at losing makes her join the Greeks in the battle against Paris's Trojans, a key event in the turning point of the war.

The long jump ( formerly commonly called the " broad jump ") is a track and field event in which athletes combine speed, strength, and agility in an attempt to leap as far as possible from a take off point.

It is conceivable that John, just because he is writing so long after the event and at a time when Mary was dead, wishes to point out to us that she was really the same as the " sinner.

Although Wöhler was always cautious about claiming that he had disproved the theory of vital force, this event has often been thought of as a turning point.

Papal claims of superiority were a sticking point in reunification, which failed in any event.

A good first approximation of Wittgenstein's point is that meaning is a social event ; meaning happens between language users.

Modern systems with a higher time resolution ( roughly 3 nanoseconds ) also use a technique ( called " Time-of-flight ") where they more precisely decide the difference in time between the detection of the two photons and can thus localize the point of origin of the annihilation event between the two detectors to within 10 cm.

God then removed the memory of this event from the minds of Mankind ( leaving only an innate awareness that He exists and is One, known as the Fitra in Islam ) and He decreed at which point each and every human would be born into the physical world.

In Four Black Dragons various peasants describe the arrival of the American ships with escalating panic, until finally the nightmarish event does seem to be, as claimed, the end of the world .... Someone in a Tree, is a compact Rashomon-and as fine as anything Mr. Sondheim has written ... The single Act II triumph, Bowler Hat, could well be a V. S. Naipaul tale set to music and illustrated with spare Japanese brushstrokes ... Bowler Hat delivers the point of Pacific Overtures so artfully that the rest of Act II seems superfluous.

Occasionally, some backup quarterbacks may be used to receive long snaps as a holder for field goal or extra point attempts, as quarterbacks generally have good ball handling skills, and may have to become the passer in the event of a bad snap, an aborted kick attempt or a designed trick play.

In this interpretation, every event is a branch point.

As a concentrated form of narrative prose fiction, the short story has been theorised through the traditional elements of dramatic structure: exposition ( the introduction of setting, situation and main characters ), complication ( the event that introduces the conflict ), rising action, crisis ( the decisive moment for the protagonist and his commitment to a course of action ), climax ( the point of highest interest in terms of the conflict and the point with the most action ) and resolution ( the point when the conflict is resolved ).

Spacetimes are the arenas in which all physical events take place — an event is a point in spacetime specified by its time and place.

Although the Super Bowl had grown into America's biggest one-day sporting event by this point, many believe the 13th edition began the game's evolution to unofficial national holiday.