4.Reliability
The reliability of a product is the probability that it will perform satisfactorily for a specified period of time under the stated set of conditions. The average of mean lifetime for a population of products, is used as the measure of reliability. Improved reliability usually is achieved through continuous improvement in materials;product design, manufacturing processes and use improvement. Reliability growth test management is a critical component of the product assurance function.


5.Serviceability and Maintainability
Maintainability or serviceability is the element of product design concerned with assuring the ability of the product to perform satisfactorily throughout its intended useful lifespan with minimum expenditure of effort and money. Maintenance can either be preventive or breakdown maintenance. Designing for good serviceability involves providing for ease of both kinds of maintenance. The availability of the product for use depends both on reliability and serviceability.


6.Environmental Friendliness
The accelerated flow of waste and emission due to the proliferation in industrial activities spurred by rising demand for consumer products is causing increased population of the ecosystem. A design that has minimal or no harmful effects during manufacture,use,and disposal is considered environmentally friendly.


7.Recyclability and Disposability
Thousand of consumer products reach the end of their useful lives and join the waste stream. Product recycling reduces the adverse impact on environment by reducing the volume of materials deposited in landfills and converses scarce natural resources.


8.Safety
The increasing number of personal injury lawsuits filed each year in courts involving consumer products indicates that safety may be the most basic consideration in product design from both the human and cost perspectives.Safety implies the absence of hazards of the minimal exposure to them during the entire life cycle of the product.


9.Customizability
Customers often are willing to pay more if their individual needs are better satisfied. Design for mass customizability is a new approach catering to an increasing variety of customer requirements without corresponding increase in cost and lead time.Providing products and services that best serve the costumers needs while maintaining mass production efficiency is a new paradigm for industry.