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Software development process model
The spiral model is a risk-driven software development process model. Based on the unique risk patterns of a given project, the spiral model guides a team
Spiral_model
American software engineer (1935–2022)
according to Boehm (1997) himself, include "the Constructive Cost Model (COCOMO), the spiral model of the software process, the Theory W (win-win) approach to
Barry_Boehm
Political science and mass communication theory
The spiral of silence theory is a political science and mass communication theory which states that an individual's perception of the distribution of public
Spiral_of_silence
Mathematical model used in music theory
theory, the spiral array model is an extended type of pitch space. A mathematical model involving concentric helices (an "array of spirals"), it represents
Spiral_array_model
Teaching technique
See also spiral model, a software development approach. The spiral approach is a technique often used in education where the initial focus of instruction
Spiral_approach
Spiral that surrounds equal area per turn
center). Fermat spirals are named after Pierre de Fermat. Their applications include curvature continuous blending of curves, modeling plant growth and
Fermat's_spiral
Software development model
The Wheel And Spoke Model is a sequentially parallel software development model. It is essentially a modification of the spiral model that is designed to
Wheel_and_spoke_model
Spiral-shaped regions of enhanced brightness within the galactic disc in spiral galaxies
Spiral arms are a defining feature of spiral galaxies. They manifest as spiral-shaped regions of enhanced brightness within the galactic disc. Typically
Spiral_arm
Integration of software development and operations
security practices. Contrary to a traditional centralized security team model, each delivery team is empowered to factor the correct security controls
DevOps
Unwanted escalation of interstate tensions
international relations, the security dilemma (also referred to as the spiral model) is when the increase in one state's security (such as increasing its
Security_dilemma
Self-similar curve related to golden ratio
of the golden spiral. Although spiral galaxies have often been modeled as logarithmic spirals, Archimedean spirals, or hyperbolic spirals, their pitch
Golden_spiral
Optimization algorithm
two-dimensional spiral models. This was extended to n-dimensional problems by generalizing the two-dimensional spiral model to an n-dimensional spiral model. There
Spiral_optimization_algorithm
Railway in Australia
The Bethungra Spiral is a heritage-listed rail spiral on the Main Southern line near Bethungra, between Junee and Cootamundra. The spiral carries the northbound
Bethungra_Spiral
Process by which software is developed
devised for the SDLC. For example, many processes can be classified as a spiral model. Software process and software quality are closely interrelated; some
Software_development_process
Concept of software development
approaches to rapid development include the adaptive, agile, spiral, and unified models. Rapid application development was a response to plan-driven waterfall
Rapid_application_development
Modelling software development in sequential phases
development process Spiral model Structured Systems Analysis and Design Method (SSADM) System development methodology Traditional engineering V-model Wagile Petersen
Waterfall_model
Class of galaxy that has spiral structures extending from their cores
Spiral galaxies form a class of galaxy originally described by Edwin Hubble in his 1936 work The Realm of the Nebulae and, as such, form part of the Hubble
Spiral_galaxy
Linear model of communication
transmission models, also termed interaction models. They include Wilbur Schramm's model, Frank Dance's helical-spiral model, a circular model developed
Shannon–Weaver_model
Self-similar growth curve
spiral, equiangular spiral, or growth spiral is a self-similar spiral curve that often appears in nature. The first to describe a logarithmic spiral was
Logarithmic_spiral
Spiral with constant distance from itself
The Archimedean spiral (also known as Archimedes' spiral, the arithmetic spiral) is a spiral named after the 3rd-century BC Greek mathematician Archimedes
Archimedean_spiral
Spiral galaxy with a central bar-shaped structure composed of stars
classifications for the galaxies are the spiral galaxy, elliptical galaxy and irregular galaxy. Although theoretical models of galaxy formation and evolution
Barred_spiral_galaxy
Topics referred to by the same term
women's publisher and art collective Spiral model, a software development process On Spirals, by Archimedes Spiral (railway), a technique employed by railways
Spiral_(disambiguation)
Software source code with poor structure
1988 paper A spiral model of software development and enhancement, the term is used to describe the older practice of the code and fix model, which lacked
Spaghetti_code
1989 book by Stephen R. Covey
Covey explains the "upward spiral" model. Through conscience, along with meaningful and consistent progress, an upward spiral will result in growth, change
The 7 Habits of Highly Effective People
The_7_Habits_of_Highly_Effective_People
Structure of software development
Raccoon, noted that project management models such as the spiral model and waterfall model, while good at managing schedules and staff, did not provide
Chaos_model
Comics character
Spiral (Rita Wayword) is a supervillain appearing in American comic books published by Marvel Comics, usually those featuring the X-Men family of characters
Spiral_(character)
executed. spiral model Is a risk-driven software development process model. Based on the unique risk patterns of a given project, the spiral model guides
Glossary_of_computer_science
Explicit listing of design decisions
includes the types of claims used in the system. WinWin Spiral Model The WinWin Spiral Model, which is used in the WinWin approach, adds the WinWin negotiation
Design_rationale
Design methodology
by Tom Wujec of Autodesk. Disruptive innovation Extreme programming Spiral model Top-down and bottom-up design Paper prototyping Scrum (software development)
Iterative_design
Engineering approach to software development
The Process Maturity Levels introduced became the Capability Maturity Model Integration for Development (CMMI-DEV), which defined how the US Government
Software_engineering
Curve whose curvature changes linearly
An Euler spiral is a curve whose curvature changes linearly with its curve length (the curvature of a circular curve is equal to the reciprocal of the
Euler_spiral
Curve that winds around a central point
Archimedean spiral Hyperbolic spiral Fermat's spiral The lituus Logarithmic spiral Cornu spiral Spiral of Theodorus Fibonacci Spiral (golden spiral) The involute
Spiral
Spiral asymptotic to a line
certain footraces, and is used to model spiral galaxies and architectural volutes. As a plane curve, a hyperbolic spiral can be described in polar coordinates
Hyperbolic_spiral
Embedded software with legally mandated safety and reliability concerns
waterfall model to coordinate the design product, but almost all explicitly permit earlier work to be revised. The result is more often closer to a spiral model
Avionics_software
Agile software development method
Agile Software Development development method using a combined spiral model/waterfall model with daily builds aimed at developing a product with high speed
Internet-speed_development
Overview of and topical guide to software engineering
model — Structured programming and Stepwise refinement SSADM Spiral model — Iterative development V-model Agile software development DSDM Chaos model
Outline of software engineering
Outline_of_software_engineering
Model of human development
Spiral Dynamics is a model of human development that posits a discrete and linear series of "stages of development" that individuals, organizations, and
Spiral_Dynamics
Competition between two or more parties to have superior armed forces
terms of the security dilemma, engineering spiral models, states with revisionist aims, and deterrence models. From 1897 to 1914, a naval arms race between
Arms_race
Integrative theory of therapy
Termination as the end of their "Spiral Model of the Stages of Change", not as a separate stage. In the 1983 version of the model, Relapse is considered one
Transtheoretical_model
Boehm. A spiral model of software development and enhancement. SIGSOFT Softw. Eng. Notes, 11(4):14–24, 1986. B. W. Boehm. A spiral model of software
RUP_hump
Type of machine learning model
A large language model (LLM) is an AI model (typically a neural network) trained on a vast amount of text for natural language processing tasks, especially
Large_language_model
Toy model of excitable media
spiral point. The limit cycle itself is unstable. Autowave Biological neuron model Computational neuroscience Hodgkin–Huxley model Morris–Lecar model
FitzHugh–Nagumo_model
1987 American TV series or program
Spiral Zone is a 1987 American science-fiction animated series produced by Atlantic/Kushner-Locke. Spiral Zone was animated by Japanese studio Visual
Spiral_Zone
High level structures of a software system
When Good Architecture Goes Bad The Spiral Architecture Driven Development – the SDLC based on the Spiral model aims to reduce the risks of ineffective
Software_architecture
Activities that make a software system available for use
customer. During this period, alternatives to the rigid waterfall model emerged. The Spiral Model, proposed by Barry Boehm in 1988, introduced a risk-driven
Software_deployment
Group of subcortical nuclei involved in the motor and reward systems
characterized in more detail by Suzanne Haber and colleagues in their 'spiral model', which postulated how the ventral striatum (limbic circuit) can influence
Basal_ganglia
Iran under the Pahlavi dynasty from 1925 to 1979
Studies 47#3 (2014): 379–399. The Iranian Crisis of 1945–1946 and the Spiral Model of International Conflict, by Fred H. Lawson in International Journal
Pahlavi_Iran
properties of RUP, such as: It is iterative and an implementation of the spiral model The process is divided in time into four phases; the inception, elaboration
UPEDU
Overview of and topical guide to software development
development IBM Rational Unified Process Spiral model Waterfall model Extreme programming Lean software development Scrum V-Model Test-driven development (TDD) Cross-functional
Outline of software development
Outline_of_software_development
1977 EP by Buzzcocks
Spiral Scratch is the debut EP by the English punk rock band Buzzcocks, released on 28 January 1977 through New Hormones. Spiral Scratch and the album
Spiral_Scratch
Galaxy in the constellation Eridanus
grand-design inner disks — a spiral within a spiral. Models suggest that the gas in a bar can be funneled inwards, and then spiral into the center through
NGC_1300
German political scientist (1916–2010)
contribution is the model of the spiral of silence, detailed in The Spiral of Silence: Public Opinion – Our Social Skin. The model is an explanation of
Elisabeth_Noelle-Neumann
Problem-solving technique that breaks down a system into its component pieces
information system includes a system analysis phase. This helps produce the data model, a precursor to creating or enhancing a database. There are several different
Systems_analysis
Model of star formation
segments of spiral arms: See (e.g) NGC 4414, as well as figures in. In 1999, the prevailing density wave model for the generation of spiral arms in galaxies
SSPSF_model
Brand of ratcheting screwdriver
but has been owned by Stanley Tools since the 1940s. All spiral ratchet screwdriver models made by Stanley did have the Yankee trade name on them, or
Yankee_screwdriver
Model of knowledge creation
and explicit knowledge is strengthened in a spiral. Nonaka and Konno subsequently developed the SECI model by introducing the Japanese concept of 'Ba'
SECI model of knowledge dimensions
SECI_model_of_knowledge_dimensions
Process of ensuring requirements are met
Paradigm Risk Management Model The Plan-Do-Check-Action Model of Quality Control Total Software Quality Control Spiral Model Of Software Developments
Software_quality_control
Soviet Union's refusal to withdraw from Iran
(link) Lawson, Fred H. (1989). "The Iranian Crisis of 1945–1946 and the Spiral Model of International Conflict". International Journal of Middle East Studies
Iran_crisis_of_1946
has authored / co authored several books:- The Incremental Commitment Spiral Model: Principles and Practices for Successful Systems and Software, by Barry
Richard Turner (computer scientist)
Richard_Turner_(computer_scientist)
Circle packing arranged in spirals
In the mathematics of circle packing, a Doyle spiral is a pattern of non-crossing circles in the plane in which each circle is surrounded by a ring of
Doyle_spiral
Software development methodology
Addison-Wesley ACM Press. pp. 15, 199. ISBN 0-201-54435-0. Boehm B, "A Spiral Model of Software Development and Enhancement Archived 2015-05-28 at the Wayback
Object-oriented analysis and design
Object-oriented_analysis_and_design
Chemical compound
the magnetic model used to interpret the powder data, the ordered moment was estimated as approximately 7.1 μB for a flat spiral model or up to 9.9 μB
Terbium_arsenate
Defunct gyro tower at Cedar Point
Space Spiral gave riders a 360-degree view of the surrounding area. It featured a distinctive two-level cabin, found only on a few early models. However
Space_Spiral
RTCA standard for safety-critical software
level). Typically used software development process: Waterfall model Spiral model V model Document outputs made by this process: Software verification cases
DO-178B
Human development theory
produces an open-ended series of levels, and has been used as a basis for Spiral Dynamics and other managerial and philosophical systems. Graves used a variety
Graves's emergent cyclical levels of existence
Graves's_emergent_cyclical_levels_of_existence
American landscape designer
Place for Personal—and Political—Renewal". Vogue. Graver, David (June 5, 2025). "Lily Kwong's Meditative Botanical Spiral in Madison Square Park". v t e
Lily_Kwong
Galaxy containing the Solar System
distribution of Cepheid variable stars in 17 other spiral galaxies to the ones in the Milky Way, and modelling the relationship to their surface brightnesses
Milky_Way
Logarithmic spiral projected onto the surface of a cone
spiral on the surface of a cone (a conical spiral), whose floor projection is a logarithmic spiral. Conchospirals are used in biology for modelling snail
Conchospiral
Fermion path integral approach in 1+1 dimensions
first extension of the model to explicitly contain such loops was the "spiral model", in which chessboard paths were allowed to spiral in spacetime. Unlike
Feynman_checkerboard
Japanese first guided missile destroyer
same as that of the Ayanami class at first, but the JMSDF applied a spiral model to Amatsukaze, allowing continual updating of her equipment as described
JDS_Amatsukaze
Spiral waves are travelling waves that rotate outward from a center in a spiral. They are a feature of many excitable media. Spiral waves have been observed
Spiral_wave
Overview of computer engineering topics
driver Software development process Software requirements specification Spiral model Agile software development Behavior-driven development Cowboy coding
Computer engineering compendium
Computer_engineering_compendium
Kitchen device
larger mixers tend to be floor models due to their size and weight. Spiral mixers are specialist tools for mixing dough. A spiral-shaped agitator counter-rotates
Mixer_(appliance)
Algorithm to detect local features in images
scale-invariant feature operator (SFOP) is based on two theoretical concepts: spiral model feature operator Desired properties of keypoint detectors: Invariance
Scale-invariant feature operator
Scale-invariant_feature_operator
de la autoeficacia en el estudio del burnout y Engagement [Towards a spiral model of self-efficacy in burnout and engagement research] Ansiedad y Estrés
Work_engagement
Economic concept
In macroeconomics, a wage–price spiral (or, conversely, a price–wage spiral) is an explanation for inflation, in which wage increases cause price increases
Wage–price_spiral
Structural theory of international relations
one of the prominent theories of neorealism: the security dilemma or spiral model. Coined by John H. Herz in his 1951 work Political Realism and Political
Defensive_realism
Topics referred to by the same term
physical wave. Wave model can refer to: Wind wave model, a mathematical model of sea waves Density wave model, a mathematical model of a spiral galaxy Kinematic
Wave_model_(disambiguation)
Generative AI chatbot by OpenAI
Originally released on November 30, 2022, the product uses large language models—specifically generative pre-trained transformers (GPTs)—to generate text
ChatGPT
Impact of forms of media in media studies
reinforcing spiral model (Slater 2007), the conditional model of political communication effects (McLeod et al. 2009), the elaboration likelihood model (Petty
Influence_of_mass_media
human rights INGOs on the Saudi Government with special reference to the spiral model". The International Journal of Human Rights: 604. Youngblood-Coleman
Human rights in Muslim-majority countries
Human_rights_in_Muslim-majority_countries
Non-equilibrium model of supply and demand
supply and demand cross; or they may spiral outwards, with the fluctuations increasing in magnitude. The cobweb model can have two types of outcomes: If
Cobweb_model
page refs highlighted at url. ISBN 978-0-471-99750-4. In mathematical modelling use is made of the theories of queueing processes and of flows in networks
List of pioneers in computer science
List_of_pioneers_in_computer_science
Roller coaster design
prototype stage in development. Intamin developed a version known as the Spiral Coaster model, building only one installation, which is no longer in operation
Pipeline_roller_coaster
Rail transport modelling
Rapids, MI: JLC Enterprises. pp. ~250. Spiral-bound (8.5×11 in) "The C/MRI a Computer/Model Railroad Interface". Model Railroader. Vol. 52, no. 2. Kalmbach
Computer Model Railroad Interface
Computer_Model_Railroad_Interface
Modernization program of United States Army
coordinating more than 550 contractors and subcontractors in 41 states. A spiral model was planned for FCS development and upgrades. As of 2004, FCS was in
Future_Combat_Systems
401 Lawson, F. H. (Aug. 1989) "The Iranian Crisis of 1945–1946 and the Spiral Model of International Conflict" International Journal of Middle East Studies
United States foreign policy in the Middle East
United_States_foreign_policy_in_the_Middle_East
Device for separating/sorting slurry or particles
The term spiral separator can refer to either a by density (wet spiral separators), or for a device for sorting particles by shape (dry spiral separators)
Spiral_separator
System of stars and interstellar matter
visual characteristics such as elliptical, spiral, or irregular. The Milky Way is an example of a spiral galaxy. In addition to shape, galaxies may be
Galaxy
Set of practices for Information Technology (IT) development, management and support
management practices across government functions, built around a process model-based view of controlling and managing operations often credited to W. Edwards
ITIL
Creating a model of the data in a system
data model may require multiple logical data models. The last step in data modeling is transforming the logical data model to a physical data model that
Data_modeling
Swedish actor
1966) is a Swedish actor, film director, screenwriter and model. In the SVT series The spiral which was broadcast in 2012, Edholm played the police Gunnarson
Rafael_Edholm
Cultural center in Jenin, West Bank, Palestine
oppressed, playback theatre, drama therapy, psychodrama, therapeutic spiral model, drama in education and sociodrama. The Freedom Theatre produced several
The_Freedom_Theatre
Physical theory of the cosmos
model advocated by Albert Einstein at that time. In 1924, American astronomer Edwin Hubble's measurement of the great distance to the nearest spiral nebulae
Big_Bang
Model of economic inflation
triangle model attempts to account for the phenomenon of stagflation. Inflation § New_Keynesians Phillips curve § Gordon's triangle model Wage-price spiral Robert
Triangle_model
Checking software against expectations
Usability testing can use structured models to check how well an interface works. The Stanton, Theofanos, and Joshi (2015) model looks at user experience, and
Software_testing
Business management strategy
Hall. Hussein, Bassam (2008), PRISM: Process Re-engineering Integrated Spiral Model, VDM Verlag [1] Industry Week (1994), "De-engineering the corporation"
Business process re-engineering
Business_process_re-engineering
ISSN 0164-1212. (with Marc Kellner and David Raffo) "Using the WinWin spiral model: a case study". Computer. 31 (7): 33–44. 1998. doi:10.1109/2.689675.
Raymond_Madachy
Galaxy in the constellation Canes Venatici
known as Messier 51a (M51a) or NGC 5194, is an interacting grand-design spiral galaxy with a Seyfert 2 active galactic nucleus. It lies in the constellation
Whirlpool_Galaxy
U.S. federal agency
distinguish from other commercial satellites. Development follows a spiral model, with each generation informed by lessons from earlier deployments, and
Space_Development_Agency
travel, tourism, insurance
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travel, tourism, insurance