Is validation by conducting expert questionnaires a valid PhD framework validation method?

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Hi all,

I am developing a framework to propose a solution for a complex multiphaceted challenge in the aerospace manufacturing industry. The framework is developed based on industry standards, technical reports, regulations, expert interviews and observation at local companies.

As the framework covers a wide range of manuracturing systems/processes that are typically spread amongst a large supply chain, a case study/implementation approach to validation isnt feasible (and cost). Is presenting the developed framework to industry experts and receiving their feedback a valid for of validation for PhD level? if so, what should I keep note of and look out for (specific to what examiners typically woiuld not approve of)?

Lastly, are there other ways of validation such a framework?

Many thanks
Duncan

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