If your company has business on the books going into the Year 2000, or is using Year 2000 dates in calculations, you need to manually review and verify the results of these systems. Payroll systems have many dates used to do simple and complex salary-related calculations. Verify that your payroll applications are Year 2000 ready before your company starts running into issues. And don't forget to review your billing applications for Year 2000 readiness. Most invoicing applications are triggered by dates.
Calculations contained within the invoice are date dependent as well.
Failures in your invoicing systems could critically damage your cash flow. All partners in your supply chain need to be examined for Year 2000 readiness. You need to develop a plan that addresses your critical business suppliers' plans for Year 2000 readiness. I would recommend that you develop contingency plans that address companies that you feel may not make it through their Year 2000 issues. Some organizations are collaborating with their critical business partners and working together on Year 2000 solutions to ensure their mutual Year 2000 readiness.