The employees at Software Solutions wear casual clothes, play pool at lunch, and bring their children to work. When Adrienne Sidon joined the company, no one explained these unwritten rules to her; she just figured them out. These informal codes of conduct followed by Software Solutions employees are known as

unspoken rule

Explanation:

unspoken rule - it is referred to that rules that are unwritten which need to be understood by examining the environment. These are considered behavioral constraints that are unwritten.

some example of unspoken rules are

-mobile phone - it should be on silent while working hour

- smoking is prohibited at workplace

In a simple way unspoken rules are rules that are not written but should be followed strictly in the organization.