Turn a customer interview into a case study

Write a customer case study from the interview below, for the {{publish_where}} of {{company}}. Its readers are prospects who resemble this customer and want evidence that the product works for someone like them.

Customer: {{customer_name}}, {{customer_industry}}
Approved quotes and figures: {{approval_notes}}

Interview transcript or notes:
"""
{{interview}}
"""

Structure it with these headings:
- Title: the result, in under 12 words.
- At a glance: three bullets with the customer, the problem and the result.
- The challenge: one paragraph.
- Why they chose us: one paragraph.
- How they use it: one or two paragraphs with concrete details.
- Results: bullets, each with a number or a specific before-and-after from the interview.
- A closing quote.

Length: 450 to 650 words.

Rules:
- Use the customer's own words in quotes. You may trim a quote for length, but never reword it or join two quotes into one.
- Every number must come from the interview or the approval notes. Do not round up, estimate or add figures.
- Leave out anything the customer said off the record or asked not to share.

The voice should be factual and specific, like a good trade-magazine profile rather than an advert.

If the interview has no measurable result, say so: do not invent one. Write Results from the qualitative outcomes and add a final note listing questions to ask the customer to get numbers, for example "How many hours a week did this save your team?"