Complex sentence: Once the sources of variation have been quantified, actions may be taken to reduce or eliminate themg a source of variation might include: development of standards; staff training; error-proofing and changes to the process itself or its inputs.
Split into simpler sentences: Once the sources of variation have been quantified, actions may be taken to reduce or eliminate them. Methods of eliminating a source of variation might include: development of standards; staff training; error-proofing and changes to the process itself or its inputs.