It's best when done on site, organized by project teams. Each team brings its project documents. Follow-up consulting for questions and reviews with feedback can be very helpful. For maximum cost-effectiveness, select a member of the project team to work with the consultant. This representative translates project issues into questions that relate to SRE practices and poses them to the consultant, substantially reducing costs.
Jump starts work but cost much more than a course with a workshop.
In a jump start, a consultant teaches by example by working in the project. It is costly for the consultant to learn and follow the project in detail. Consequently, there is a high risk that they are not applying SRE correctly.