Stress equation of a modern worker: a level of in-built stress for the individuals working within a team, arise from having task responsibility reduced by the level of powerlessness to carry them out, combined with the level of blame being apportioned to that individual’s performance.
stress = level of responsibility – powerlessness – blame
The relative levels of the factors on the RHS of the equation combine to determine the level of stress experienced by the individual. Healthy stress is linked to productivity, longevity etc; unhealthy stress to experiences such as burnout, fatigue.
(eg. a negative “score” – the experience of unhealthy stress – would mean that factors of powerlessness and blame are greater than the level of responsibility given / taken by the individual for their performance / output / delivery etc)
Ask any project manager about the key to their success, and they will say that delivering a project is often more like a "dark art" or by chance, than a predictable science.