19 October, 2015.Ĭare Home Staffing Model The Care Home Staffing Model (CHSM) is an Excel-based tool which summarises the functional needs (or dependency) of individual residents based on the care home Indicator of Relative Need or ioRN measure. Developing a dependency and capacity staffing tool. It comes with a self-assessment enabling you to test your knowledge after reading it. On the Rhys Hearn Dependency Assessment Tool and EMI Based on CAPE. Assessment, a critical tool for learning, as a method for preliminary assessment.