Six Sigma is a robust problem-solving method. However, training is often expensive due to time and software requirements.
Over the course of my career, have often had to deliver easy-to-use, how-to, training on the Six Sigma method. These slides teach how to begin, execute and complete a project using key tools, such as CTQ tree, Process Mapping, Measurement System Analysis, Capability, Hypothesis Testing, Design of Experiments, Brainstorming, Control Charts, etc.
Including exercises, this training can be delivered in 3 days; and with some mentorship, close to green belt level performance can be achieved.
thanks for your interest.