The constructor contributes to the owner's improvement requirements and passes on better carbon data for future schemes; runs a routine for judging its own buying process and setting incentives or requirements that get whole life carbon cuts from its chain; records as-built data and feedback so that baselines improve; and judges the skills and capability in its own business and, where they fall short, provides training or guidance on carbon assessment, on baselines and targets, on low-carbon solutions, on low-carbon buying, and on monitoring and reporting.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.