Don't Change horse in midstream!

In the long run,especially in a project you are not familiar with.
You can use the tracer bullit . It's a rapid and effitive way to find the real requirments and solutions.
Maybe in the last year, my boss told me .When you shot, you can use the regualar way
Ready , aim and Fire! But in the project , you can use another way : Ready Fire and aim.
Today , I understand it! Thank you sir!

When you find a way, it's effective, hold on!
Don't Change horse in midstream!

The following  4 points , you should forbide them as soon as posible!

poor encapsulation
high coupling
hard-coded logic
parameters in the code