In negotiating DWGs of a single employer (including variations), and when an inspector settles unresolved particulars under s 45, the following must be weighed: headcount at each workplace covered; the character of every kind of work done there; how many employees do alike work or share alike working arrangements, and how they cluster; the locations in which each kind of work happens; the nature of hazards present; any overtime or shift arrangements; and whether employees speak languages other than English. Omitting a factor exposes the grouping to challenge.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.