Mostly the technology products and software products are cluttered with multifunctions to the extent that usability suffers. Usability is the Satisfaction Quotient of Customer with your product. It is not that customer uses what is designed but it is that product is designed with user profile and educational back ground in mind. A low end BOP cell should be made by keeping in the mind that user is illiterate and must use local language which the user understands or voice interface should be used. This is only one example, you could your self think of many such examples.