Meeting every requirement is important. The Kano Model helps identify which ones actually build customer satisfaction.

Most manufacturers focus on meeting customer requirements. Far fewer ask a more important question: which requirements actually drive customer satisfaction, and which ones, if missing, lead to immediate rejection?

At ADIS, we use the Kano Model as part of our quality planning process to help answer exactly that.

Developed by Professor Noriaki Kano in the 1980s, the Kano Model is a proven Six Sigma framework that classifies product and process requirements into three categories:

Basic needs. The fundamentals customers expect without mentioning them. If they're missing, nothing else matters. Dimensional accuracy. The correct material. On-time delivery. These are simply the cost of entry.

Performance needs. The requirements customers explicitly ask for, where better performance creates greater value. Surface finish. Cycle time. Process capability. These are the areas where suppliers begin to differentiate themselves.

Delighters. The unexpected value customers never requested but genuinely appreciate. Proactive reporting. Early-stage DFM input. Identifying a potential issue before it reaches the production line. These are the moments that build trust and long-term partnerships.

Why does this matter in plastic injection molding?

Because not every quality initiative delivers the same return. Without a structured way to prioritise, it's easy to devote significant time and resources to requirements customers simply assume will be met, while overlooking the opportunities that truly strengthen customer relationships.

The Kano Model helps our teams focus their efforts where they create the greatest impact. We ensure the fundamentals are flawless, optimise the attributes that customers value most, and continually look for opportunities to deliver more than expected.

In automotive manufacturing, where expectations are high and supplier performance is constantly evaluated, that kind of structured thinking helps transform a supplier into a trusted long-term partner.

How does your organisation distinguish between the requirements that are expected and the ones that truly create customer value?