Disruption types The causes of disruption are varied: They can be internal to your organisation (e.g. a key member of staff retiring or failure of your IT systems), or external (e.g. severe weather closing down the road network or the business failure of one of your key suppliers). Disruptive incidents are not uncommon, so effective planning and preparation is essential. Utility (electricity, water, gas) interruptions and phone loss are common causes of disruption.