Just a thought, from RESULTS ORIENTED
SAD People
Finance professor Lisa Kramer (UofT), financial economist Mark Kamstra (FRB Atlanta), and international finance professor Maurice Levi (UBC)studied the investing patterns of people with Seasonal Affective Disorder (SAD).

People with SAD become risk-averse during fall (autumn) as the days grow shorter. Once the days become longer, they appear willing to take financial risks. The fluctuations are more pronounced, the further from the equator the people live and work.

SAD causes varying levels of depression, and affects 15% of the population.
Or one in seven of your team.
Are these fluctuations in line, or out of step with business cycles?
Could this be impacting the project?

Source: University of Toronto Magazine, 2003 article 'Taking Stock of SAD'