1. Agree the definitions first
Decide when a deal counts as won, whether revenue is recognised on won, invoiced or paid, and what a qualified lead is. Everything downstream depends on these three answers.
2. Fix the data that feeds the reports
Reports inherit the quality of the pipeline. Owners, stages, amounts and close dates have to be maintained, and activity should log itself wherever possible.
3. Separate reporting into three cadences
Daily for things still changeable today, weekly for deals at risk, monthly for the retrospective. Mixing them produces a pack that is urgent and historical at once.
4. Keep drill-down on everything
Any figure should open into the records behind it. This is what converts a report from an assertion into something a team can examine.
5. Deliver to the people who act
Schedule the report to the person who can do something about it. A weekly overdue list is for the sales manager, not for the whole company.
6. Retire what nobody uses
Review the report list each quarter and delete anything that has not driven a decision. A short set that people trust beats a library nobody opens.