Glossary – Chapter 2 - Functional manager Manager of a permanent organization - Interpersonal conflict Difficulties encountered by people in getting along with others without friction. - Maintenance personnel Those assigned to fix system bugs and make hardware and software changes. - Programmers Information systems personnel responsible for building systems. - Project manager Individual assigned the responsibility of organizing and managing a project - Systems administrators Those responsible for software implementations - Systems analysis Information systems personnel responsible for identifying system needs and designing the software product. - Testers Those responsible for software quality assurance. - Waterfall model Prototypical list of the systems development activities that are usually present in an information systems project.