In my circuit design, I use a power supply filter design commonly used in my company, i.e. a pi filter which has a big electrolytic cap(10uF), an inductor and a small ceramic capacitor(100nF) at the other end, for every module in my circuit. How should I design these values for an industrial grade design?
You're basically asking, how to design a power supply filtering and bypassing network. This question is really too broad to answer completely here, but I'll give some general ideas. Probably other answers will point out issues I've forgotten or alternative solutions.
I'll assume you're talking about a PC board design (as opposed to IC design or chassis system design).
The power supply filter has several responsibilities in your circuit:
In order to design your power supply network carefully, you will need to model each of the sources of noise, then use calculations or simulations to determine how each contributes to the effects I outlined; then determine a filter topology and component values that adequately constrain these effects.
Roughly speaking, the input (10 uF in your example) cap and inductor in your circuit are responsible for #1; The individual 0.1 uF caps at each IC are responsible for #2; and the 0.1 uF caps and inductor are responsible for #3.
Also, the importance of each issue depends on the details of your circuit:
A couple of other considerations:
That said, the network you describe is a very common one that will be adequate for many situations. If you have a good reason to improve it, please ask more specific questions and we will try to assist you.
Depends on the output impedance of the previous stage, the input impedance of the next stage, and the cutoff frequency you want. Without all of that information your design will not be adequately constrained. You'll need to model it as an ideal voltage source, inline with an output impedance, in parallel with the first pi leg, in series with the top of the pi filter, in parallel with the second pi leg and the input impedance of the second stage.