Sustainable Software will drastically modify a typical software organisation.
Sustainable Software is based on some community driven effort. So even if, as it is the case generally, the core of the program is still developed and maintained by a small number of developers recruited and paid by the editor, the editor will still have to face and to deal with external contributions.
This will significantly impact the organisation of the company, the revenue streams, the relationships with customers,...
You will find in the sub-pages the following best practices: