Swarming is necessary for the following reasons: It prevents the problem from progressing downstream, where the cost and effort to repair it increases exponentially and technical debt is allowed to accumulate. It prevents the work center from starting new work, which will likely introduce new errors into the system. If the problem is not addressed, the work center could potentially have the same problem in the next operation (e.g., fifty-five seconds later), requiring more fixes and work. See Appendix 6.
