required
In product development and process optimization, a requirement is a singular documented physical or functional need that a particular design, product or process aims to satisfy. It is commonly used in a formal sense in engineering design, including for example in systems engineering, software engineering, or enterprise engineering. It is a broad concept that could speak to any necessary (or sometimes desired) function, attribute, capability, characteristic, or quality of a system for it to have value and utility to a customer, organization, internal user, or other stakeholder.
Requirements can come with different levels of specificity; for example, a requirement specification or requirement "spec" (often imprecisely referred to as "the" spec/specs, but there are actually different sorts of specifications) refers to an explicit, highly objective/clear (and often quantitative) requirement (or sometimes, set of requirements) to be satisfied by a material, design, product, or service.A set of requirements is used as inputs into the design stages of product development. Requirements are also an important input into the verification process, since tests should trace back to specific requirements. Requirements show what elements and functions are necessary for the particular project. When iterative methods of software development or agile methods are used, the system requirements are incrementally developed in parallel with design and implementation. With the waterfall model requirements are developed before design and implementation.
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Requirements can come with different levels of specificity; for example, a requirement specification or requirement "spec" (often imprecisely referred to as "the" spec/specs, but there are actually different sorts of specifications) refers to an explicit, highly objective/clear (and often quantitative) requirement (or sometimes, set of requirements) to be satisfied by a material, design, product, or service.A set of requirements is used as inputs into the design stages of product development. Requirements are also an important input into the verification process, since tests should trace back to specific requirements. Requirements show what elements and functions are necessary for the particular project. When iterative methods of software development or agile methods are used, the system requirements are incrementally developed in parallel with design and implementation. With the waterfall model requirements are developed before design and implementation.
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UFH Advice required
Good Evening, We live in an old stone farmhouse which we are steadily 'improving' as the years go by. The heating is provided by a CTC GSi 12 GSHP feeding UFH in the kitchen and Dining Room and radiators elsewhere. The time is fast approaching when the bathroom is due a workover. In common...- linesrg
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- advice required ufh
- Replies: 4
- Forum: Water Underfloor Heating Advice
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help required with sealed leaking bath
I have a sealed bath that is leaking into my kitchen when emptied, unfortunately the pervious owner has tiled all around the bath without leaving an access panel to the pipework/drain . is their a liquid sealant that i can use to fix the leak or do i have to remove all the tiles . I have tired...- Tony782614
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- america bath help help required leaking required sealed usa
- Replies: 3
- Forum: USA
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Bar shower mixer ID required please...
Can anyone identify the make ans model of this shower please? Thank you. G. View: https://*********/Br6X2xq -
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Is an additional vent required?
Hi I have a toilet in a ground floor WC that was served by a maserator. After problems with blocked pipework due to the long run I thought it would be a good idea to have to toilet connected to the sewage system to get rid of the maserator and pipework etc. After having a new ensuite added to...- steles
- Thread
- additional required vent
- Replies: 4
- Forum: DIY Plumbing Forum
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Is G3/notification required for a CH buffer?
Is G3 or any other building regs notification required to install a buffer tank on a central heating system?- siricosm
- Thread
- buffer required
- Replies: 1
- Forum: Central Heating Forum
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Motor bearing size required for old style electro oil burner
I attended a lock out on a 40 year old Myson with an electro oil burner.Old style with orange fan housing.End dog was destroyed due to worn bearings.I replaced both bearings but one was the smaller type.Unfortunately i used my last one and forget the size as i need to order more. Not very common...- freeoil
- Thread
- burner motor oil old required size style
- Replies: 2
- Forum: Oil and Solid Fuel Forum
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New oil fired boiler is a new tank required
My daughter wanted a quote for a replacement oil fired boiler. The heating engineer who she knows and trusts says that the existing tank is too close to the flue outlet and is not a double skin tank. He says that he is not allowed to replace the boiler unless she moves the position of the tank...- Vicdiy
- Thread
- boiler fired oil required tank
- Replies: 9
- Forum: Central Heating Forum
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Liverpool New boiler and pressurised cylinder replace exist boiler in new location.
I need a G3 qualified Heating Engineer to supply and install a new Vaillant 32kw ecotec central heating boiler with Green iQ system Vaillant smart heating control. Building has two bathrooms and one shower room and I want to increase ensuite facilities to four other rooms at a later date...- architype 1
- Thread
- boiler cylinder existing liverpool location new boiler pressurised replace required
- Replies: 0
- Forum: Plumbing Jobs | The Job-board
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Bath waste leak washer required
Hi All Every now and then I have to unscrew the chrome waste which is attached under my freestanding bath and pull all the hair out from the plug hole. Unfortunately the greenish gasket/washer that goes inside the u type chrome bend which then screws onto the threaded plug hole sticking through...- dwalsh1
- Thread
- bath bath waste leak required washer waste
- Replies: 1
- Forum: Bathrooms, Showers and Wetrooms
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Old bathstore mytime toilet seat required
Hi, Does anyone know where to get replacement parts for old bathstore my time toilet, I need a new toilet seat. Any help would be welcome. Thanks- TOOL666
- Thread
- bathstore old parts replacement required toilet toilet seat
- Replies: 1
- Forum: Bathrooms, Showers and Wetrooms
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Fitting advice required for 30mm female thread
Hello. What fitting do I need to connect an apparent 30mm diameter in/outlet, on a water pump, to 25mm MDPE pipe. It's on a DAB Jetinox 112M. Thanks in advance. -
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New boiler required advice please
I have an Ecotec 615 system boiler fitted in 2007. Recently fault code 75 has appeared and the boiler won't ignite. It goes through 5 cycles trying to turn on before the fault code appears. An engineer has been out three times and has tried fitting a new pressure sensor switch, a new pump and... -
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IDEAL ICOS HE 15 L&F Troubleshooting Help Required
Hi, I have a an IDEAL ICOS HE 15 boiler that was fitted in 2005 to a new build property and in general it's been pretty reliable over the years. However the last few weeks it started to show an L&F fault, which a reset normally clears for a week or so. However yesterday morning I woke to the L&F...- saltyzip
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- help help required icos ideal required
- Replies: 2
- Forum: Central Heating Forum
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Required valve setup
Hello, I currently have a pressurised cylinder with immersion heater powered by solar panels that provides hot water throughout except one sink. I have a combi boiler which supplies that sink and the central heating and helps top up the hot water whilst it’s dark. I am just installing a new... -
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Cardiff area work required
Remove and cap off gas fire. And remove and install a radiator with some small pipe work. Quote please.- henry1266
- Thread
- gas gas fire pipework radiator remove required work
- Replies: 0
- Forum: Plumbing Jobs | The Job-board
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Help required to replace broken toilet cistern push button
Hi there, I was hoping you lovely people could help me to identify this toilet cistern push button system below, so I can replace it or get something similar. The internal push button is completely broken, but would I need to replace the whole part of the cistern section with the external push... -
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Boiler help required
Baxi main Eco Elite. Shower taking ages to warm up if at all and when it does the hw light still doesn't come on. Central heating fine, diverter valve changed within last two years -
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1750x750 bath required.
Can anyone recommend a good quality 1750x750 double ended bath. There is one available made by RAK but I am not sure about the quality of RAK products. -
Experienced plumbing engineer required !!
We are a small business based in west malling, kent. We are looking for Experienced plumbing engineer to join our team on a self employed basis (non Smoker preferred), we will supply uniform, van & tools (except hand tools). Pay dependant on experience, Must have public liability insurance...- plumb_know
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- engineer experienced plumbing required
- Replies: 1
- Forum: Plumbing Jobs | The Job-board
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What cable is required for Nest Heatlink?
What cable do I need to connect a Nest HeatLink to my boiler (Ideal Mexico)? A description would be useful, a link to an actual sales site even better. Nest customer service seemingly are unable to answer this question. Although they provide instructions in diagrammatic form for DIY...
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