How much do you trust each of your team members? Do you trust each one differently? Probably. Unless you trust all of them unconditionally or none of them at all, each member of your team has earned a different degree of your trust.
Naturally you want to get to a point where you can trust all of them with almost anything. Until then you have to evaluate how much you trust each and assign responsibilities to each accordingly. To some extent you do this already. But consider formalizing your evaluations.
Use the following four steps to evaluate each member of your team. Imagine that you have to assign an important project. As you consider assigning the project to each person, apply each of these Feel, Think, Act, Talk checks.
Are you excited or apprehensive? If you had to decide this second without thinking, would you trust that the task will be completed on time and with quality? Given what you feel, is trust evident with this team member?
Given what you think, is trust reasonable? As objectively as possible, consider how past assignments have turned out. Evaluate only actual events rather than general impressions.
When you think of this person, what is happening in your body? Do your muscles tense? When you meet with this person, if you avoid eye contact, move closer or speak more loudly to ensure your point is understood, you probably don’t trust them.
Some of your team members may cause you to explain things in greater detail to ensure they understand a task and what you expect them to deliver. Others need much less detail because your trust level is so high.
If you answer in the positive to all four modes above, you probably have high trust. Otherwise look into each person more carefully to identify your specific trust issues. As your measure your trust, assign work, and check your evaluation against results, you will fine tune your Feel. Think. Act. Talk. evaluation skills.