QSS: Quality/testing strategy to be added to the Handbook #68

[DCTFUK]

As part of the QSS, we've agreed that quality standards and an adherence thereto will be a measured KPI. Part of this is to add a document to the Handbook detailing our quality standards:

a high-level (possibly client-facing) overview of our practices;
a lower-level breakdown of the kinds of quality measures we expect on every project;
potentially further implementation details on each of the measures (e.g. specific tooling.)
This should be reviewed by our Tech. Leads and this will form the basis of their roles: they will be responsible for their respective project's adherence to these measures, to be reviewed quarterly.

Copied from https://github.com/TheDataShed/Engineering/projects/11#card-76467723

[DCTFUK]

Potentially include a quality-measure relating to the time-to-effectiveness of new Engineers (as drafted in new joiner guide 1-2-1 section.)