気温と作業効率

https://gyazo.com/12128df8ab91090849d6f1afaffa91ef

The highest productivity is at temperature of around 22 ℃. For example, at the temperature of 30 ℃ the performance is only 91.1% of the maximum i.e. the reduction in performance is 8.9%

Olli Seppänen et al. "EFFECT OF TEMPERATURE ON TASK PERFORMANCE IN OFFFICE ENVIRONMENT"