Six months after launching an internal assistant, a company reports that eighty per cent of employees have used it and calls the initiative a success. What is the flaw in that conclusion?

• AEighty per cent is too low a threshold for a successful rollout.
• BUsage shows that people opened it, not that any outcome changed.
• CAdoption should be measured weekly rather than cumulatively.
• DEmployee surveys are a more reliable measure than usage logs.