Eighty percent of them are wrong. Year 2000 problems span the entire business, from the factory floor to the executive washroom and from the supply chain to product liability. For most companies, resolving their year 2000 issues will either be the largest project they have ever undertaken, or the last. It is true that year 2000 affects data processing systems, many of which will be older mainframe systems, but this is only the start of the problem. Newer client-server systems are likely to fail.
Spreadsheets are likely to fail.
Desktop systems of all sorts will need to be checked if they are important to the business and if they are sensitive, in any way at all, to the current date. In thirty years, microprocessors have penetrated most areas of business life. All these and more need to be checked. There is embedded logic in many products, which needs to be checked too. The finance director will be appalled - these problems are too serious to ignore, but the costs could be enormous and the value to the business seems zero.