About this presentation – part one After 30 years at IBM I still hadn’t seen a “top 10 list of questions to ask when some code doesn’t work”. The best we had was a Problem Solving flowchart. So, just before I retired from IBM I tried to write one. https://www.amazon.co.uk/Work-Mug-Problem-Flowchart-Personalised/dp/B06XY8D23G