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PERT Chart
The program evaluation and review technique (PERT) is a statistical tool used in project management, which was designed to analyze and represent the task (project management), tasks involved in completing a given project. First developed by the United States Navy in 1958, it is commonly used in conjunction with the critical path method (CPM) that was introduced in 1957. Overview PERT is a method of analyzing the tasks involved 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. It incorporates uncertainty by making it possible to schedule a project while not knowing precisely the details and Duration (project management), durations of all the activities. It is more of an event-oriented technique rather than start- and completion-oriented, and is used more in those projects where time is the major factor rather than cost. It is applied on very large-scale, one-time, complex, no ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pert Chart Colored
Pert or PERT may refer to: Ships * - see List of United States Navy ships: P * , a World War II corvette, originally HMS ''Nepeta'' * ''Pert'' (sidewheeler), a 19th-century steamboat that operated in British Columbia, Canada Statistics * PERT distribution People * Pert (surname) * Pert Kelton (1907–1968), American actress PERT * Program evaluation and review technique, or PERT Chart, a planning method * Postsecondary Education Readiness Test, a placement test used by Florida high schools and colleges Other uses * Pert Plus, a brand of shampoo marketed in Australia and New Zealand as Pert * P e ^ , an expression to calculate the expected return from a continuously compounded investment given the principal, rate, and time See also * Peart Peart is the surname of: *Alan Peart (1922–2018), New Zealand Second World War flying ace * Bob Peart (1926–1966), English football player *Charles Peart (1759–1798), British sculptor * Darrell Peart (born 1950), American furnitu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Schedule (project Management)
In project management, a schedule is a listing of a project's milestones, activities, and deliverables. Usually dependencies and resources are defined for each task, then start and finish dates are estimated from the resource allocation, budget, task duration, and scheduled events. A schedule is commonly used in the project planning and project portfolio management parts of project management. Elements on a schedule may be closely related to the work breakdown structure (WBS) terminal elements, the Statement of work, or a Contract Data Requirements List. Overview In many industries, such as engineering and construction, the development and maintenance of the project schedule is the responsibility of a full-time scheduler or team of schedulers, depending on the size and the scope of the project. The techniques of scheduling are well developed but inconsistently applied throughout industry. Standardization and promotion of scheduling best practices are being pursued by the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gantt Chart
A Gantt chart is a type of bar chart that illustrates a project schedule, named after its popularizer, Henry Gantt (1861–1919), who designed such a chart around the years 1910–1915. Modern Gantt charts also show the dependency relationships between activities and the current schedule status. Definition A Gantt chart is a type of bar chart that illustrates a project schedule. This chart lists the tasks to be performed on the vertical axis, and time intervals on the horizontal axis. The width of the horizontal bars in the graph shows the duration of each activity. Gantt charts illustrate the start and finish dates of the terminal elements and summary elements of a project. Terminal elements and summary elements constitute the work breakdown structure of the project. Modern Gantt charts also show the dependency (i.e., precedence network) relationships between activities. Gantt charts can be used to show current schedule status using percent-complete shadings and a vertical ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lead
Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, lead is a shiny gray with a hint of blue. It tarnishes to a dull gray color when exposed to air. Lead has the highest atomic number of any stable element and three of its isotopes are endpoints of major nuclear decay chains of heavier elements. Lead is toxic, even in small amounts, especially to children. Lead is a relatively unreactive post-transition metal. Its weak metallic character is illustrated by its amphoteric nature; lead and lead oxides react with acids and bases, and it tends to form covalent bonds. Compounds of lead are usually found in the +2 oxidation state rather than the +4 state common with lighter members of the carbon group. Exceptions are mostly limited to organolead compounds. Like the lighter members of the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Float (project Management)
In project management, float or slack is the amount of time that a task in a project network can be delayed without causing a delay to: * subsequent tasks ("''free float''") * project completion date ("''total float''"). ''Total float'' is associated with the path. If a project network chart/diagram has 4 non-critical paths then that project would have 4 ''total float'' values. The ''total float'' of a path is the combined ''free float'' values of all activities in a path. The ''total float'' represents the schedule flexibility and can also be measured by subtracting early start dates from late start dates of path completion. Float is core to critical path method, with the total floats of noncritical activities key to computing the critical path drag of an activity, i.e., the amount of time it is adding to the project's duration.* Example Consider the process of replacing a broken pane of glass in the window of your home. There are various component activities involved in the pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harold Bright Maynard
Harold Bright Maynard (Oct. 18, 1902 - Mar. 10, 1975) was an American industrial engineer, consulting engineer at the Methods Engineering Council, and management author. He is known as the "Broadway counsel for industries, railroads, state governments" and as recipient of the Henry Laurence Gantt Medal in 1964. Life and work Maynard was born in 1902 in Northampton, Massachusetts to William Clement Maynard and Edith Lucia (Clark) Maynard. He attended the Protestant Episcopal Academy in Philadelphia, where he graduated in 1919. In 1923 he obtained his M.Sc in mechanical engineering at Cornell University.''Who's who in Commerce and Industry.'' Vol. 6, 1948. p. 921 After his graduation in 1923 he started as a graduate student in the production steam division of Westinghouse Electric Corporation in Pittsburgh, where he was employed until 1929. From 1929 to 1934 he studied industrial problems in the U.S. and in Europe. In 1934 he founded the consulting firm ''Methods Engineering Coun ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Work Breakdown Structure
A work-breakdown structure (WBS) in project management and systems engineering is a deliverable-oriented breakdown of a project into smaller components. A work breakdown structure is a key project deliverable that organizes the team's work into manageable sections. The Project Management Body of Knowledge (PMBOK 5) defines the work-breakdown structure as a "hierarchical decomposition of the total scope of work to be carried out by the project team to accomplish the project objectives and create the required deliverables." A work-breakdown structure element may be a product, data, service, or any combination of these. A WBS also provides the necessary framework for detailed cost estimation and control while providing guidance for schedule development and control.Booz, Allen & HamiltoEarned Value Management Tutorial Module 2: Work Breakdown Structure [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aerospace Industry
Aerospace is a term used to collectively refer to the atmosphere and outer space. Aerospace activity is very diverse, with a multitude of commercial, industrial and military applications. Aerospace engineering consists of aeronautics and astronautics. Aerospace organizations research, design, manufacture, operate, or maintain both aircraft and spacecraft. The beginning of space and the ending of the air is considered as 100 km (62 mi) above the ground according to the physical explanation that the air pressure is too low for a lifting body to generate meaningful lift force without exceeding orbital velocity. Overview In most industrial countries, the aerospace industry is a cooperation of the public and private sectors. For example, several states have a civilian space program funded by the government, such as National Aeronautics and Space Administration in the United States, European Space Agency in Europe, the Canadian Space Agency in Canada, Indian Space R ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
UGM-27 Polaris
The UGM-27 Polaris missile was a two-stage solid-fueled nuclear-armed submarine-launched ballistic missile (SLBM). As the United States Navy's first SLBM, it served from 1961 to 1980. In the mid-1950s the Navy was involved in the Jupiter missile project with the U.S. Army, and had influenced the design by making it squat so it would fit in submarines. However, they had concerns about the use of liquid fuel rockets on board ships, and some consideration was given to a solid fuel version, Jupiter S. In 1956, during an anti-submarine study known as Project Nobska, Edward Teller suggested that very small hydrogen bomb warheads were possible. A crash program to develop a missile suitable for carrying such warheads began as Polaris, launching its first shot less than four years later, in February 1960. As the Polaris missile was fired underwater from a moving platform, it was essentially invulnerable to counterattack. This led the Navy to suggest, starting around 1959, that they be g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Bibliography
Bibliography (from and ), as a discipline, is traditionally the academic study of books as physical, cultural objects; in this sense, it is also known as bibliology (from ). English author and bibliographer John Carter describes ''bibliography'' as a word having two senses: one, a list of books for further study or of works consulted by an author (or enumerative bibliography); the other one, applicable for collectors, is "the study of books as physical objects" and "the systematic description of books as objects" (or descriptive bibliography). Etymology The word was used by Greek writers in the first three centuries CE to mean the copying of books by hand. In the 12th century, the word started being used for "the intellectual activity of composing books." The 17th century then saw the emergence of the modern meaning, that of description of books. Currently, the field of bibliography has expanded to include studies that consider the book as a material object. Bibliography, in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Librarian
A librarian is a person who works professionally in a library providing access to information, and sometimes social or technical programming, or instruction on information literacy to users. The role of the librarian has changed much over time, with the past century in particular bringing many new media and technologies into play. From the earliest libraries in the ancient world to the modern information hub, there have been keepers and disseminators of the information held in data stores. Roles and responsibilities vary widely depending on the type of library, the specialty of the librarian, and the functions needed to maintain collections and make them available to its users. Education for librarianship has changed over time to reflect changing roles. History The ancient world The Sumerians were the first to train clerks to keep records of accounts. ''"Masters of the books"'' or "keepers of the tablets" were scribes or priests who were trained to handle the vast amount and c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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