UNICEF suggest “SWOT and PESTEL can be applied to large or small (but significant) projects or decisions. If time is very limited, or for small projects, do a quick SWOT in an hour (remembering to identify the Opportunities and Threats first, and then the Strengths and Weaknesses). With more time, or for projects/decisions with larger implications, do a full SWOT and PESTEL in about 3 hours, plus preparation time. With even more time, or for very significant projects/decisions, expand the time accordingly, up to a full day workshop. ” (UNICEF)