They offer principles and methods for analyzing systems, which, if. followed, should help health care administrators and clinicians properly analyze. their units or facilities, and should lead to more robust patient safety interventions. In this paper, steps for executing a work system analysis are provided.
The mantle is a layer between the crust and the outer core. Earth's mantle is a silicate rocky shell with an average thickness of 2,886 kilometres (1,793 mi). The mantle makes up about 84% of Earth's volume.
  The earth's mantle is not made of metal but is a mixture of many somewhat molten rocks, most as oxides, meaning the mantle may be more oxygen than metal.