1 Function point analysis can be used to determine which environment/language/tool is more productive. 2  Function point analysis can provide a mechanism to track and monitor scope creep. 3  Function point counts at the end of each phase/stage of a project can be compared to the function points actually delivered.
You should keep most tax-related documents for a minimum of three years, but it's recommended that you keep them for seven years. If you've gone paperless, then your bank will generally store your statements for seven years, but check to see what your bank's policy is on maintaining its customers' records.
Generally speaking, hang onto bills and bank statements for at least two years, and insurance documents as long as they are valid. When it comes to tax-related paperwork like pay slips, P45s and so on, HMRC suggests keeping them for at least 22 months from the end of the tax year they relate to.