The purpose of TPM is to generate a strong relationship between
maintenance employees and other employees in organizations in order to keep
machines and equipments running and also to optimize the organizational overall
performance [5]. TPM is a people oriented strategy that concentrates on
improving equipment effectiveness and removing breakdowns [6]. Moreover,
TPM can eliminate the wastes that create through the six major losses in
companies. Failures embrace the losses such as breakdown, set up, stoppage,
decreased speed, defects and reworks and start up. The safer environment is
resulted from controlling these six losses [7, 8].
On the other hand, Six Sigma is a managerial approach to improve the
processes of products and services in order to increase continuous improvement
and decrease defects in organizations [9]. The aim of improvement process is to
remove the origin reasons of performance defects in processes that previously are
present in the organizations [10].