If the business process is new to the organization and the new process workflows are largely managed in the vendor software, yes. Some business processes could have many workflows that would take hours, weeks, months to perform end to end completion, which can't really be walked-through. A paper exercise can be performed or it can be accelerated artifically with automation, scripting to simulate time dilation, etc. Don't forget integration testing. Some level of walk through is recommended before delivery and to reduce risk exposure if the process can be built iteratively and incrementally without to much disruption to the organization this will bound the scope of the walk-through into something smaller and more manageable.
If there are any Chapter of section contradicts with the customer non system requirements that it should be inspection otherwise it should be a walk-through.
For example, if customer is asking for 20% holding of payments on each deliverable but your business process says 10% can be hold till the acceptance of the deliverable. In such scenario it must be an inspection.
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