Top down approach
Protecting the organization and its data resources requires the complete support of the executive management team with the top business technology leader as a fully functioning member of this group with control and influence over business technology spend regardless of the department or group doing the spending. It can't be done by an IT manger several levels down in the organization reporting to the head of accounting which is still the organization structure at the majority of corporations. Otherwise shadow IT results in extreme exposure, risk, and potentially high losses. Few non-technology executives understand these consequences particularly by the revenue generating areas that seem to always be getting "their" way right or wrongly.