Ask what the test really needs
- Does the result depend on real I/O timing or electrical behaviour? Keep it close to hardware.
- Is the purpose software logic, diagnostics or parameter boundaries? Consider SIL or a virtual ECU.
- Does the check require target compiler or processor behaviour? PIL may be enough.
- Is the same logic being reimplemented separately for SIL and HIL? Fix the architecture before adding coverage.
The design goal
The goal is not to eliminate HIL. It is to reserve HIL for the behaviours that justify HIL, while keeping reusable test intent, parameters and expected results portable across environments.
That increases execution frequency, reduces bench queues and lets expensive integration failures surface earlier.
Apply the pattern
Is this happening in your program?
Describe the current environment and the bottleneck. We can turn it into a bounded verification or automation scope instead of starting with a generic consulting package.