BPOs have a modulated process and imply draconian measures to provide clients 100 percent results-oriented output and strategies as seen on http://www.callcriteria.com . A BPO should have trained professional team and 24/ 7 Technical Support backup to provide a delightful experience with the wide range of services they offer. As the agents are the key components of Call Centers, their performance is always under the radar. In order to ensure their quality and efficiency, the BPO must provide them with the necessary training in the fields of order-taking, processing, responding to inquiries and troubleshooting. A help desk solution should also be maintained to cater to customers' specific needs. The quest for survival is heating up as the competition in this industry gets fiercer making the task of an inbound or outbound call center more important than ever before. BPO services are generally categorized into horizontal or vertical services. A horizontal BPO involves function-centric outsourcing: the vendor specializes in carrying out particular functions across different industry domains. Samples of horizontal BPO are procurement, payroll processing, human resources, facilities management, and similar functions. On the other hand, a vertical BPO focuses on providing various functional services in a limited number of industry domains: health care, financial services, manufacturing, and retail, are representative instances.