When clients come to see factory, what they want to see?

When client come to view the factory, what they want to see?  

There are a lot of answers, such as below. But i think it is most important, they want to see the trust, trust this supplier is to help them to make the decision. 

Production & capacity

• Live production of slides, flumes, pools, play structures, spray features.
• Daily/weekly output, lead times for standard vs. custom items, peak capacity.
• Ability to scale for park-sized projects and concurrent installations.

Materials & fabrication

• Types/grades of materials used (fiberglass resin/class, GRP layup schedule, stainless steel grade, HDPE, PVC, coatings).
• Sample panels/cores showing laminate thickness, reinforcement, gelcoat quality.
• Cutting, bending, welding, and joining processes for metal parts; NDT if used.

Tooling & molds