Other examples
A group of accountants working on improving a management report has a strongly structured work style, and consequently use NGT rather than Brainstorming to come up with the right format.
A sales manager, wanting to put together a presentation for a key customer, brings together the account manager, the product marketing manager and the two key product engineers. The quality manager facilitates a session for them, where they quickly find the key product benefits over the competing products, and come up with a compelling value proposition.
A product line team cannot agree on the best sound-proofing for a plate press, and the production manager will not pay until they agree. They get the line facilitator to run an NGT session to help uncover the real problems. This reveals that a couple of people have preferred brands and no trials have been done. After a visit to a local trade show and internal trials, they agree on a compromise system.