$13.$ What is one reason that Six Sigma is more difficult to apply to service processes? a$.$ There is no manual that suggests how Six Sigma can be applied to services. b$.$ The work product is more difficult to see.c$.$ There is no way to measure process capability of a service product.d$.$ The National Six Sigma Society cautions against using it for services$\mathrm{.}14.$ A successful TQM program incorporates all of the following except a$.$ continuous improvementb. employee involvementc. benchmarkingd. centralized decision$-$making authoritye. none of the above; a successful TQM program incorporates all of the above$15.$ Continuous improvement is a philosophy that:a$.$ uses problem$-$solving techniques within work teams.b$.$ ensures there are plenty of quality inspectors to find areas for improvement.c$.$ waits until a big problem occurs, then systematically solves it$.$d$.$ encourages the hiring of statistical process control specialists to reduce the need for