If you want to achieve business success, Please remember: 

  Give users what they want
  Don’t create obstacles 

Usability engineering helps you optimize user experience for your product/application, so you can achieve business success.

"Human-centered design”is characterized by: the active involvement of users and a clear understanding of user and task requirements; an appropriate allocation of function between users and technology; the iteration of design solutions; multi-disciplinary design……… ISO 13407

The purpose of user-centered analysis is to gather data and analyze data for the product being designed. This is a discovery process, uncovering……

Stakeholders and their purposes and objectives   Who are users, how do they think and work?   What affect users’ tasks?   what do users expect from the design?   Users’ aspiration, what are their issues and motivations?
Research indicates： 80% of software costs come from post-release maintenance requirements. (Pressman, 1992) 80% of maintenance comes from unforeseen or unmet user requirements. (Martin and McClure, 1983)

User-centered Design challenges traditional software development life-cycle: More groups than ever are involved in the design process. You need to achieve balance between business goals and user goals.