Expressing criticism to your boss: Five things you should definitely keep in mind. Keep your criticism objective and constructive.
Don't get emotional when talking to the boss. Be careful with your choice of words and don't be tempted into emotional exclamations. Instead, take time after each question and think of a clear and factual answer. You can definitely tell the boss what you think. Insults or personal attacks are of course taboo. Maintain eye contact during the conversation and try to put yourself in your boss's shoes.