s the bidder have in the area of offering support to customers similar in size and business focus to your company? Is all or any part of the Professional Services provided through an outsourcer or third-party provider? If the answer is yes to the previous question, how does the bidder select and review the performance of its subcontractors and suppliers? Quality In engineering and manufacturing, quality control is used in developing systems to ensure products or services are designed and produced to meet or exceed customer require- ments. There are defined rules and regulations to produce goods that ensure the quality. Different kinds of industry certifications are also available that show the vendors' credi- bility to manufacture the specific product. For example, ISO 9001 certification ensures that the manufacture has a set of procedures that covers all key processes in the business; it keeps adequate records checks output for defects, with appropriate and corrective 184 SIP Trunking action where necessary, and facilitates continual improvement. ISO 9000 is an interna- tional standard that many companies use to ensure that their quality assurance system is in place and effective. Conformance to ISO 9000 is said to guarantee that a company delivers quality products and services. Some engineering companies go through a quality assurance process of establishing evi- dence that provides a high degree of assurance that a product, service, or system accom- plishes its intended requirements. And sometimes some equipment needs compliance with different regulatory bodies and environmental organizations. But it is important to realize also that quality is determined by the intended users, clients, or customers, not by society in general: It is not the same as "expensive" or "high quality." Even goods with low prices can be considered quality items if they meet a market need. We have categorized the quality control mechanism in two broad areas: Quality assurance Certification The following quality-related items need to be