The core of the SLA is the detailing of the minimum standard of service expected. The SLA helps to manage the risks in the banker customer relationship. The performance of the bank has to be measured against Key Performance Indicators (KPIs). An SLA governs internal, as well as external processes. When preparing an SLA, a treasurer will be representing many stakeholders on his side. The content of an SLA should be precise and detailed so both parties know what to expect. As the banker customer relationship evolves over time, so the SLA will have to be reviewed and updated.