Disaini ja arenduse sisendiks olevad nõuded on sageli uurimistöö tulemus ning neid saab väljendada laiemas ja üldisemas tähenduses kui disaini ja arenduse väljundiks olevaid nõudeid. Lisaks saab kasutada täpsustit disainitava ja arendatava olemuse tähistamiseks, nt tootedisain ja -arendus, teenusedisain ja -arendus või mõõteprotsessidisain ja -arendus.
The requirements forming input to design and development are often the result of research and can be expressed in a broader, more general sense than the requirements forming the output of design and development. A qualifier can be applied to indicate the nature of what is being designed and developed (e.g. product design and development, service design and development or measuring process design and development).
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