Normally after modelling a business process that requires improvement, the question of automation comes up. The easiest tasks to automate are those that can be written done as a simple sequence of steps and which don't require value judgements, for example reformatting data, sending emails or texts, posting letters, placing orders or carrying out simple arithmetic. The automation of more complex tasks can also be done, but it becomes increasingly difficult, and with more complicated and fragile procedures the benefits of automation against continuing to have a person make the decision must be carefully evaluated. Sometimes by restructuring or breaking down a task, the part that requires the difficult decision can be separated from more straightforward elements, meaning that staff can work more effectively focussing only on the parts of the job that require their skills.