I am trying to evaluate a circuit with a lot of parts given their associated tolerances and I'm really struggling.
For the electronic parts with 2% tolerance I am guessing the values are to specification by about 5 \$\sigma\$ spread, for 1% perhaps 4 \$\sigma\$ and 0.05% parts perhaps 3 \$\sigma\$.
What can I do to to arrive at a unified value representing 3 \$\sigma\$ spread overall? Would I adjust the tolerance value according to some function and re-run the max-min calculation or do I need to evaluate each item separately with the other parts set to nominal values (0% tolerance)?
Thanks in advance.