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There are four kinds of dependencies with respect to ordering terminal elements (in order of decreasing frequency of use):

1. Finish to start (FS)
   • A FS B = B doesn't start before A is finished
   • (Foundations dug) FS (Concrete poured)
2. Finish to finish (FF)
   • A FF B = B doesn't finish before A is finished
   • (Entire book written) FF (Last chapter written)
3. Start to finish (SF)
   • A SF B = B doesn't finish before A starts
   • (New shift started) SF (Previous shift finished)
4. Start to start (SS).
   • A SS B = B doesn't start before A starts
   • (Project work started) SS (Project management activities started)

There are three kinds of dependencies with respect to the reason for the existence of dependency:

1. Causal (logical)
   • It is impossible to edit a text before it is written
   • It is illogical to pour concrete before you dig the foundations
2. Resource constraints
   • It is logically possible to paint four walls in a room simultaneously but there is only one painter
3. Discretionary
   • I want to paint the living room before painting the dining room, although I could do it the other way round, too

Traditional critical path-derived schedules are based only on causal (logical) dependencies. The critical chain method necessitates taking into account resource constraint-derived dependencies as well.

See also:

• list of project management topics
• project network
• project planning

In computer science, dependency is a state that one object uses a functionality of another object. This may cause changes on implementation of one object can affect that of another object. Supposedly, Information hiding is a way to eliminate dependency to limit influence of changes and improve modularity. Dependencies can be reduced by applying the dependency inversion principle . Examples of dependency relationships are aggregation (is-part-of), inheritance, subtyping, uses and implements relationships.

It also is common in talking about software packageA software package is a special method for the distribution and installation of software on computer systems. The most common type of software package seen by the average computer user is that found sold in stores. An example might be a popular word proce management. One software package, in order to work or to be fully functional, may depend on other software packages and thus must be installed also, and their specific versions must be known if backwards compatibility is broken between versions. The Apt package format, as well as some versions of the RPMRPM Package Manager (or RPM originally called "Red Hat Package Manager") is a package management system primarily intended for Linux. RPM installs, updates, uninstalls, verifies and queries software. RPM is the baseline package format of the Linux Standar package format, include dependency information between packages. This is convenient for updating software but can lead to dependency hellDependency hell occurs in package-based operating systems particularly Linux and is a colloquial term for the frustration of many users who have installed software packages which have dependencies on specific versions of other packages. This version infor.

See also Dependent areaDependent areas are territories that for some reason do not enjoy full independence or sovereignty as states. There are varying degrees and forms of such a dependence. Dependent territories are commonly distinguished from subnational entities of the same

In Behavioral medicine dependence describes a continuum of physical and psychological attachments related to the concept of addictionAddiction is an uncontrollable compulsion to repeat a behavior regardless of its negative consequences. A person who is addicted is sometimes called an addict . Many drugs or behaviors can precipitate a pattern of conditions recognized as addiction, which.

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DependencyIn project management, a dependency is a link amongst a project's terminal elements. There are four kinds of dependencies with respect to ordering terminal elements (in order of decreasing frequency of use): # Finish to start (FS) # A FS B B doesn't start Dependency ratioIn economics, the dependency ratio is the ratio of the economically dependent part of the population, to the productive part. The economically dependent part is recognised to be children who are too young to work, and individuals that are too old, that is Dependency theoryDependency theory is the body of theories by various intellectuals, both from the Third World and the First World, that propound a worldview that suggests that the wealthy nations of the world need a peripheral group of poorer states to remain wealthy. Dependency hellDependency hell occurs in package-based operating systems particularly Linux and is a colloquial term for the frustration of many users who have installed software packages which have dependencies on specific versions of other packages. This version infor Dependency grammarDependency grammar (DG) is a class of syntactic theories separate from generative grammar. Structure is determined by the relation between a word (a head) and its dependents. One difference from phrase structure grammar is that dependency grammar does not