DFT: Designing a Schematic / PCB to allow measuring resistor values
Most folk add test points on each node and use "golden boards" as references for what the correct design implementation is. If during a test of a real production board the combination of this resistor and that resistor in parallel with another series resistor looks beyond what the tolerances suggest, then one of those resistors is probably wrong and testing another two nodes might pin-point the wrong resistor.

Be practical.