The ESTEMPLE model (Angwin, Cummings, Smith 2007) takes PEST analysis further,
adding ecological, media, legal, and ethical dimensions to the well-known
political / economic / social / technological model.
To gauge each driver's influence on your business context, I score each driver
on three axes. Dynamism (intensity and frequency of change),
complexity (number, relatedness, and diversity of contributing
factors), and unpredictability (cyclicality of change and
clarity of data). Even a broad brush can give surprising insights.