ISO 11228-1:2003 applies to manual handling of objects with a mass of 3 kg or more.
ISO 11228-1:2003 applies to moderate walking speed, i.e. 0,5 m/s to 1,0 m/sec on a horizontal level surface.
ISO 11228-1:2003 does not include holding of objects (without walking), pushing or pulling of objects, lifting with one hand, manual handling while seated, and lifting by two or more people. Holding, pushing and pulling objects will be included in other parts of ISO 11228.
ISO 11228-1:2003 is based on an 8 h working day. It does not concern analysis of combined tasks in a shift during a day.