Encouraging the subordinates is necessary in our professional life. No one is 100% perfect and being a boss, if you try to evaluate their work investigating at a micro level then chances are there you will never be completely satisfied with their work. At times, you should be ready to accept the minor flaws as long as it does not affect the core business of the company. Start looking things at a broader perspective and such subordinates who are excused for their silly mistakes in the initial stages of their career with the company will prove to be a great contributors. This is the way company grows and remember employees are the back bone. If you do not have staff to work for you, you cannot satisfy your clients.