Maturity – although not necessarily older, on average, than in the expansion stage, enterprises in this stage are typically more than twice as large. Organisational structures are more complex than hitherto, with a mean of 4.00 organisational levels. Centralisation is declining and formalisation increasing. There is a mean of 10.17 specialised functions. Mean sales revenues growth is 99 per cent per annum, and mean employment growth is 28 per cent per annum.