A showcause notice is issued when there is no clear cut prima facie misconduct. A show cause is an opportunity given to an erring employee to expalin his/her behaviour. A minimum time should be given for receipt of a written reply from the employee. Depending on the reply or non-receipt of the same further action can be initiated. This would be the chargesheet stage. Usually companies have their own set of dicipline rules which are called Standing Orders which govern such situations. In absence of any such well defined set of rules one may refer to the Model Standing Orders which are appended in any book of (even book of bare acts) Labour Laws.