पद-related tasks (पदविधि) rely on समर्थ-पद.
समर्थ-पद has three attributes: 1. आकांक्षा (desire) 2. योग्यता (joining) 3. आसत्ति (closeness). These associations depend on property of सामर्थ्य (worth) which could be through व्यपेक्षाभाव (expectation) or एकार्थीभाव (similar meaning).
पदविधि is the process which takes the विभक्ति away from an entity. For example, when दशरथस्य पुत्रः becomes दशरथपुत्रः, one doesn't go about saying वृद्धस्य दशरथपुत्रः (to imply वृद्धस्य दशरथस्य पुत्रः). Instead one would वृद्धः दशरथपुत्रः.
Now पदविधि is in following ways:
1. समास (joining) through सामर्थ्य
2. विभक्ति (cases)
3. पराङ्गवद्भाव (2.1.2)
4. क्रुद्व्ऋत्ति (धातु +सुप्)
5. तद्धित
6. धातु (धातु + सन्)
7. एकशेष (when one word signifies the meaning of the group including itself).