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Condition that must be satisfied for an engineered work to be acceptable
In engineering, a requirement is a condition that must be satisfied for the output of a work effort to be acceptable. It is an explicit, objective, clear
Requirement
Any task which a system must be able to complete
In software engineering and systems engineering, a functional requirement defines a function of a system or its component, where a function is described
Functional_requirement
Type of regulation on commercial banks
Reserve requirements are central bank regulations that set the minimum amount that a commercial bank must hold in liquid assets. This minimum amount, commonly
Reserve_requirement
Requirement prioritization is used in the Software product management for determining which candidate requirements of a software product should be included
Requirement_prioritization
Required amount of capital needed by financial institutions
Capital requirements (or capital adequacy requirements) refer to the set of rules and guidance that banks must observe in most current bank prudential
Capital_requirement
paragraphs. If a requirement is derived from another requirement, their relation is named "derive requirement relationship". If a requirement is contained
Requirement_diagram
Type of requirement in systems engineering
In systems engineering and requirements engineering, a non-functional requirement (NFR) is a requirement that specifies criteria that can be used to judge
Non-functional_requirement
An Operational Requirement, commonly abbreviated OR, was a United Kingdom (UK) Air Ministry document setting out the required characteristics for a future
Operational_Requirement
Listing of intelligence priorities by officials
Intelligence requirements (IR) are a ranking of topics or issues by priority which are used to inform the allocation of resources for intelligence collection
Intelligence_requirement
Environment needed to run software
(computer) system requirements and are often used as a guideline as opposed to an absolute rule. Most software defines two sets of system requirements: minimum
System_requirements
Loophole legislation that allowed Spanish atrocities in the New World
The Spanish Requirement of 1513 (Requerimiento) was a declaration by the Spanish monarchy of Castile's divinely ordained right to take possession of the
Spanish_Requirement_of_1513
Cold weather requirement in agriculture
The chilling requirement of a fruit is the minimum period of cold weather after which a fruit-bearing tree will blossom productively. It is often expressed
Chilling_requirement
Production planning, scheduling, and inventory control system
Material requirements planning (MRP) is a production planning, scheduling, and inventory control system used to manage manufacturing processes. Most MRP
Material requirements planning
Material_requirements_planning
Engineering process
conflicting requirements of the various stakeholders, analyzing, documenting, validating, and managing software or system requirements. Requirements analysis
Requirements_analysis
United Kingdom sustainable government finance policy
The Public Sector Net Cash Requirement (PSNCR), formerly known as the Public Sector Borrowing Requirement (PSBR), is the official term for the Government
Public Sector Net Cash Requirement
Public_Sector_Net_Cash_Requirement
SOLAS requirement to be able to return to port
comply with the Safe Return to Port requirement in the 2009 International Safety of Life at Sea treaty. The requirement was prompted by the increasing size
Safe Return to Port requirement
Safe_Return_to_Port_requirement
1961 foreign document certification treaty
The Convention of 5 October 1961 Abolishing the Requirement of Legalisation for Foreign Public Documents, also known as the Apostille Convention, is an
Apostille_Convention
Programming concept
Software requirements for a system are the description of what the system should do, the service or services that it provides and the constraints on its
Software_requirements
Type of requirement in systems engineering
Architecturally significant requirements are those requirements that have a measurable effect on a computer system’s architecture. This can comprise both
Architecturally significant requirements
Architecturally_significant_requirements
Thing that is necessary for an organism to live a healthy life
A need is a requirement for survival or optimal functioning at a point of time and in a given context. Needs are distinguished from wants. In the case
Need
Educational plan
or school system. However, even when core requirements exist, they do not necessarily involve a requirement for students to engage in one particular class
Curriculum
Sub-discipline of requirements management
Requirements traceability is a sub-discipline of requirements management within software development and systems engineering. Traceability as a general
Requirements_traceability
Group of European states without mutual border controls
with France offering technical expertise to help Cyprus meet final requirements for external-border management. Diplomatic backing, combined with a positive
Schengen_Area
British military defense specification
Operational Requirement F.155 was a specification issued by the British Ministry of Supply on 15 January 1955 for an interceptor aircraft to defend the
Operational_Requirement_F.155
Project management issue
project, and it can endanger many of them. Scope creep is also known as requirement creep, kitchen sink syndrome, mission creep, or feature creep, with the
Scope_creep
Software engineering document
The user requirement(s) document (URD) or user requirement(s) specification (URS) is a document usually used in software engineering that specifies what
User_requirements_document
Type of financial collateral used to cover credit risk
initial margin requirement ) ( 1 − maintenance margin requirement ) {\displaystyle \textstyle P=P_{0}{\frac {(1-{\text{initial margin requirement}})}{(1-{\text{maintenance
Margin_(finance)
Description of a software system to be developed
software requirements specification (SRS) is a description of a software system to be developed. It is modeled after the business requirements specification
Software requirements specification
Software_requirements_specification
Process of documenting and prioritizing requirements
Requirements management is the process of documenting, analyzing, tracing, prioritizing and agreeing on requirements and then controlling change and communicating
Requirements_management
Defining and maintaining requirements in systems engineering
In the waterfall model, requirements engineering is presented as the first phase of the software development process. Later development methods, including
Requirements_engineering
Nutrient for the human body
recommendation is based on structural requirements only and disregards use of protein for energy metabolism. This requirement is for a normal sedentary person
Protein_(nutrient)
Legally binding document establishing rights and duties between parties
Obligations created by contracts can generally be transferred, subject to requirements imposed by law. Laws regarding the modification of contracts or the assignment
Contract
The maintenance requirement in biology is typically defined as the minimum quantities of foods of various types needed to sustain the necessary biological
Maintenance requirement (biology)
Maintenance_requirement_(biology)
Checking software against expectations
may involve a Requirements gap – omission from the design for a requirement. Requirement gaps can often be non-functional requirements such as testability
Software_testing
NBMR-3 or NATO Basic Military Requirement 3 was a document produced by a North Atlantic Treaty Organisation (NATO) committee in the early 1960s detailing
NBMR-3
Collection of the requirements of a system
In requirements engineering, requirements elicitation is the practice of researching and discovering the requirements of a system from users, customers
Requirements_elicitation
Employment law concept
fide occupational qualification (BFOQ) (US), bona fide occupational requirement (BFOR) (Canada), or genuine occupational qualification (GOQ) (UK) is
Bona fide occupational qualification
Bona_fide_occupational_qualification
Topics referred to by the same term
Minimum maintenance requirement may refer to: Design of a building to minimise the requirement for maintenance through facility management The minimum
Minimum maintenance requirement
Minimum_maintenance_requirement
Visa requirements for United States citizens are administrative entry restrictions by the authorities of other states that are imposed on citizens of the
Visa requirements for United States citizens
Visa_requirements_for_United_States_citizens
US system of nutrition recommendations
provides several different types of reference values: Estimated Average Requirements (EAR), are expected to satisfy the needs of 50% of the people in that
Dietary_Reference_Intake
Ballotpedia. Retrieved January 5, 2026. "Alaska Citizenship Voting Requirement Initiative (2026)". Ballotpedia. Retrieved March 30, 2026. "Arizona Proposition
2026 United States ballot measures
2026_United_States_ballot_measures
Series of directives established by the US federal government
In the United States, compliance requirements are a series of directives United States federal government agencies established that summarize hundreds
United States compliance requirements
United_States_compliance_requirements
The Kansas Citizenship Voting Requirement Amendment is a legislatively referred constitutional amendment that will appear on the ballot in the U.S. state
2026 Kansas Citizenship Voting Requirement Amendment
2026_Kansas_Citizenship_Voting_Requirement_Amendment
Specifications of what value a project will provide when completed
Business requirements (BR), also known as stakeholder requirements specifications (StRS), describe the characteristics of a proposed system from the viewpoint
Business_requirements
An Urgent Operational Requirement (UOR) is a system used by the British Ministry of Defence (MOD) to obtain urgent equipment for operations. UORs supplement
Urgent Operational Requirement
Urgent_Operational_Requirement
Registration to practice law in a US jurisdiction
jurisdiction. Federal courts, although often overlapping in admission requirements with states, include additional steps for admission. Typically, lawyers
Admission to the bar in the United States
Admission_to_the_bar_in_the_United_States
Visa requirements for British citizens are administrative entry restrictions by the authorities of other states placed on citizens of the United Kingdom
Visa requirements for British citizens
Visa_requirements_for_British_citizens
Clearing balance requirement (sometimes referred to as Settlement balances requirement) is the amount of money or balance which Financial institutions
Clearing_balance_requirement
Postgraduate academic degree
Design and Media, and the Society for Artistic Research. The specific requirements to earn a PhD degree vary considerably according to the country, institution
Doctor_of_Philosophy
Web browser made by Mozilla
version uses the WebKit layout engine instead of Gecko due to platform requirements. An optimized version was also available on the Amazon Fire TV as one
Firefox
Managed care approach to prescription
protocol or a fail first requirement, is a managed care approach to prescription. It is a type of prior authorization requirement that is intended to control
Step_therapy
American stealth air superiority fighter
including more stringent signature reduction requirements in December 1985 and the addition of the requirement for flying technology demonstrator prototypes
Lockheed_Martin_F-22_Raptor
Measure used to restrict access by age
Discord/Zendesk (2025) and Persona (2026). Australia intended to implement requirements for age verification under the Online Safety Act 2021. In August 2023
Age_verification
Food produced by bacterial fermentation of milk
of colony-forming units (CFU) of bacteria; for example, in China, the requirement for the number of lactobacillus bacteria is at least 1 million CFU per
Yogurt
Visa requirement policy for Indian citizen
Visa requirements for Indian Citizens are administrative entry restrictions by the authorities of other countries placed on citizens of India. As of 2026
Visa requirements for Indian citizens
Visa_requirements_for_Indian_citizens
Minimum age for an elected governmental official
Council member. In Canada, the constitution does not outline any age requirements to run for elected office, simply stating "Every citizen of Canada has
Age_of_candidacy
Government report on President Bill Clinton
Referral from Independent Counsel Kenneth W. Starr in Conformity with the Requirement of Title 28, United States Code, Section 595(c), is a United States federal
Starr_Report
Hardware and software controls used on critical process systems
analysis (PHA), such as a Layers of Protection Analysis (LOPA). The SIL requirements are verified during the design, construction, installation, and operation
Safety_instrumented_system
Passport of the Republic of Somaliland issued to Somalilander citizens
biometric passport in 2014, in line with new global standards and the requirements of the International Civil Aviation Organization. The color of the Somaliland
Somaliland_passport
Formal Requirements Elicitation Tool (FRET) is a requirements engineering tool. It was developed by the NASA Ames Research Center to specify complex safety-critical
FRET_(software)
The Minimum Funding Requirement (MFR) was a part of United Kingdom legislation in the Pensions Act 1995, and was introduced on 6 April 1997. The Pensions
Minimum_funding_requirement
The Occupational Requirements Survey (ORS) is a survey of establishments in the United States that is conducted by the Bureau of Labor Statistics (BLS)
Occupational Requirements Survey
Occupational_Requirements_Survey
1915 United States Supreme Court case
amount-in-controversy requirement for diversity jurisdiction by seeking non-monetary relief if the value of that relief satisfies the requirement. For instance
Glenwood Light & Water Co. v. Mutual Light, Heat & Power Co.
Glenwood_Light_&_Water_Co._v._Mutual_Light,_Heat_&_Power_Co.
Natural born citizen clause for executive office
citizen differently. Many countries specify citizenship since birth as a requirement to hold certain offices. This is often described using the natural born
Natural-born-citizen_clause
Concept in patent law
Sufficiency of disclosure or enablement is a patent law requirement that a patent application disclose a claimed invention in sufficient detail so that
Sufficiency_of_disclosure
2021 Microsoft operating system version
as a free upgrade for devices running Windows 10 that meet its system requirements. The Windows Server counterpart, Windows Server 2025, was released in
Windows_11
Laws requiring proof of identity to vote
is allowed to vote before presenting an eligible photo ID. The legal requirement to present a photo ID has been in effect since 1 August 2000. In Finnish
Voter_identification_laws
Outline of intended product functions
A product requirements document (PRD) is a document containing all the requirements for a certain product. It is written to allow people to understand
Product_requirements_document
Legal concept to make a party aware of a legal process affecting them
Notice is the legal concept describing a requirement that a party be aware of legal process affecting their rights, obligations or duties. There are several
Notice
Indian multi-role helicopter
development was prolonged due to multiple factors including the Indian Army's requirement for design changes, budget restrictions, and sanctions placed on India
HAL_Dhruv
Description of a system to be built
A System Requirements Specification (SysRS) (abbreviated SysRS to be distinct from a software requirements specification (SRS)) is a structured collection
System requirements specification
System_requirements_specification
Business analysis and software development technique
with stakeholders on the importance they place on the delivery of each requirement; it is also known as MoSCoW prioritization or MoSCoW analysis. The term
MoSCoW_method
Organizational concept
financial compliance requirements, and organizations also use it for addressing technical, environmental, and health and safety requirements. Corporate financial
Governance, risk, and compliance
Governance,_risk,_and_compliance
Clause of the US Constitution specifying natural born US citizenship to run for President
eligibility requirements established in the United States Constitution for holding the office of president or vice president. This requirement was intended
Natural-born-citizen clause (United States)
Natural-born-citizen_clause_(United_States)
Legal requirement
In law, the duty to retreat, or requirement of safe retreat, is a legal requirement in some jurisdictions that a threatened person cannot harm another
Duty_to_retreat
Right to vote in public and political elections
property requirement for general electorates were able to vote in them or in the Māori electorates but not both. 1879 – Property requirement abolished
Suffrage
Package management system for Python
formatted file and the following command, where requirements.txt is the name of the file: pip install -r requirements.txt To install some package for a specific
Pip_(package_manager)
Military helicopter
February 2026 the Leonardo AW149 was selected to fulfil the requirement. The initial requirement was for up to 44 medium-lift support helicopters, to replace
New_Medium_Helicopter
election, the following minimum voting requirements applied initially: Regarding the List A or B requirement, one vote had to be cast for a List A candidate
2020 International Criminal Court judges election
2020_International_Criminal_Court_judges_election
Legal requirement to achieve an impossible proof
diabolica (Latin for "devil's proof" or "diabolical proof") is a legal requirement to achieve an impossible proof. Where a legal system would appear to
Probatio_diabolica
As of 2021, 36 states have enacted some form of voter ID requirement. Voter ID requirements are generally popular among Americans, with polls showing
Voter identification laws in the United States
Voter_identification_laws_in_the_United_States
Liquidity requirement in the Basel Framework
In addition to changes in capital requirements, Basel III also contains two entirely new liquidity requirements: the net stable funding ratio (NSFR)
Net_stable_funding_ratio
Nutrients supporting human health
linked to poverty, food security, or a poor understanding of nutritional requirements. Malnutrition and its consequences are large contributors to deaths,
Human_nutrition
tolerated, and it is available in coffeeshops for those meeting the same age requirement. Cannabis was first criminalised in the Netherlands in 1953, following
Cannabis_in_the_Netherlands
Passport requirement for entry into the US from select countries of the Americas
Western Hemisphere Travel Initiative (WHTI) is the implementation of a requirement to show a passport or other acceptable document to enter the United States
Western Hemisphere Travel Initiative
Western_Hemisphere_Travel_Initiative
Architectural style for client-server applications
Irvine. To create the REST architectural style, Fielding identified the requirements that apply when creating a world-wide network-based application, such
REST
Proposed American military helicopter
a proposed helicopter design intended to meet the United States Army requirement for a Future Attack Reconnaissance Aircraft (FARA). It is based on technology
Bell_360_Invictus
Passport issued to citizens of Mali
passeport est valable pour tous les pays du monde, sauf l'Ukraine." Visa requirements for Malian citizens ECOWAS passports List of passports Republic of Mali
Malian_passport
Concept in copyright law
embodied in the earlier work for the latter work to satisfy copyright law's requirement of originality.[citation needed] Although serious emphasis on originality
Derivative_work
Legislations regarding telephone calls
restricted with various levels of privacy protection, law enforcement requirements, anti-fraud measures, or individual party consent. The federal Telecommunications
Telephone_call_recording_laws
NFR (Non-Functional Requirements) need a framework for compaction. The analysis begins with softgoals that represent NFR which stakeholders agree upon
Non-functional requirements framework
Non-functional_requirements_framework
Fictional school in ''Harry Potter''
attacks students until Harry kills it. A magical room called the Room of Requirement is also located in Hogwarts. It only appears when someone needs it, and
Hogwarts
High level of performance in a chess tournament
threshold (for instance, 2600 for Grandmaster (GM) norm), and there is a requirement on the level of tournament, for instance by a prescribed minimal number
Norm_(chess)
Indian processed food certification mark
Processing Industries of the Government of India. Containers and labeling requirement Limits of poisonous metals in fruit products List of permissible harmless
FPO_mark
Hockey Federation allowed shorts for women in 2023, dropping the skirt requirement due to concerns of embarrassment. Female umpires were traditionally skirted
Trousers_as_women's_clothing
Internet service
registration walls (for instance, that of The New York Times) with the requirement of compulsory registration. This came in response to the increasing number
BugMeNot
Information security standard
Information security management systems — Requirements, is an information security standard. It specifies the requirements for establishing, implementing, maintaining
ISO/IEC_27001
Legal process recording publication of a work
which provide rights harmonized at an international level without a requirement for national registration. However, the U.S. still provides legal advantages
Copyright_registration
Professional association for architects
US-based architects are members of the AIA, it is not a professional requirement. The American Institute of Architects (AIA) was founded in 1857 in New
American Institute of Architects
American_Institute_of_Architects
Official announcement of an upcoming marriage
whose traditions are similar. In 1983, the Catholic Church removed the requirement for banns and left it to individual national bishops' conferences to
Banns_of_marriage
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