Such requests must be properly controlled. A request priority must be negotiated and if costs are changed for a request costing and change negotiation mechanisms must be established. A typical maintenance and control document are the following:
Maombi hayo lazima vizuri kudhibitiwa. ombi kipaumbele lazima mazungumzo na kama gharama ni iliyopita kwa ombi kugharimu na mabadiliko ya majadiliano taratibu lazima imara. matengenezo ya kawaida na hati kudhibiti ni yafuatayo: