Phase-gate model
(noun)
A new product development strategy that is divided into phases, separated by gates.
Examples of Phase-gate model in the following topics:
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Strategy
- These include Six Sigma , which aims to drive variation out of a process; Lean, which acts to drive out waste; and traditional project management and phased development systems (including the popular Phase–gate model, discussed next), which encourage upfront planning and following the plan.
- In a phase–gate model, also referred to as a phase–gate process, the process is divided into stages or phases, separated by gates.
- At each gate, the continuation of the process is decided by (typically) a manager or a steering committee.
- The phase–gate model may also be known as stage-limited commitment or creeping commitment.
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Hardware and Software Improvements
- CMOS logic gates have allowed computing to become a commodity which is now ubiquitous—embedded in many forms, from greeting cards and telephones to satellites.
- The waterfall model shows a process where software developers are to follow these phases in order:
- Reviews may also be employed to ensure that the phase is indeed complete.
- The phase completion criteria are often referred to as a "gate" that the project must pass through to move to the next phase.
- Waterfall discourages revisiting and revising any prior phase once it's complete.
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The Action Potential and Propagation
- This moving change in membrane potential has three phases.
- The depolarization, also called the rising phase, is caused when positively charged sodium ions (Na+) suddenly rush through open voltage-gated sodium channels into a neuron.
- The repolarization or falling phase is caused by the slow closing of sodium channels and the opening of voltage-gated potassium channels.
- As the sodium ion entry declines, the slow voltage-gated potassium channels open and potassium ions rush out of the cell.
- Hyperpolarization is a phase where some potassium channels remain open and sodium channels reset.
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Architecture of the Han Dynasty
- Remains of Han Dynasty architecture include ruins of brick and rammed earth walls, rammed earth platforms, and funerary stone pillar-gates.
- Other ceramic models from the Han burial sites reveal a variety of building types.
- These include multi-story storehouses such as granaries, courtyard houses with multi-story halls, kiosks, walled gate towers, mills, manufactories and workshops, animal pens, outhouses, and water wells.
- Even models of single-story farmhouses show a great amount of detail, including tiled roofs and courtyards.
- A stone-carved pillar-gate, or que (闕), 6 m (20 ft) in total height, located at the tomb of Gao Yi in Ya'an, Sichuan province, was built during the Eastern Han Dynasty (25-220 CE).
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Gatekeeping
- Information must pass a "gate" to move from one channel to the next.
- Lewin was an influential behavioral and organizational psychologist who proposed the Phases of Change Model.
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Generation Time
- In autecological studies, bacterial growth in batch culture can be modeled with four different phases: lag phase, exponential or log phase, stationary phase, and death phase .
- The exponential phase (sometimes called the log phase or the logarithmic phase) is a period characterized by cell doubling.
- At death phase, bacteria run out of nutrients and die.
- This basic batch culture growth model draws out and emphasizes aspects of bacterial growth which may differ from the growth of macrofauna.
- The phases of growth are labelled on top.
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Growth models
- These models are also used in research into growth problems.
- Kazanjian and Drazin (1980), for example, developed a four-phase growth model, and identified the typical growth problems of fast-growing firms in each phase.
- Phase 3, Growth: The fast-growth phase is characterized by its focus on the market.
- Although life phase models like these can help the decision-making process in research and practice, they also have their pitfalls.
- Firm growth does not always develop through the phases of such models in a straightforward, linear way, for example.
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Stages of the Action Potential
- Refractory Phase.
- The refractory phase takes place over a short period of time after the depolarization stage.
- Shortly after the sodium gates open, they close and go into an inactive conformation.
- The sodium gates cannot be opened again until the membrane is repolarized to its normal resting potential.
- During the refractory phase this particular area of the nerve cell membrane cannot be depolarized.
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Scheduling
- In order to reduce costs, an airline may want to minimize the number of airport gates required for its aircraft.
- For example, in order to reduce costs, an airline may want to minimize the number of airport gates required for its aircraft.
- This Gantt chart aids in scheduling by visualizing and relating phases of production.
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Modern Sculpture
- Rodin's work signified a departure from the traditional themes of mythology and allegory prevalent during his time, and instead modeled the human body with intense realism, celebrating the individual character, psychological states, and physicality of his subjects.
- At this exhibition, Rodin showed his works Burghers of Calais, Balzac, and debuted his Gates of Hell.
- The Gates of Hell is a group of sculptures depicting scenes of physical and psychological turmoil from Dante's Inferno in high relief .
- The Gates of Hell is a group of sculptures depicting scenes of physical and psychological turmoil from Dante's Inferno