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PSD.6:3 - Forces
| Force | Tension |
| Fit | A Method must address the live difficulty, while familiar expertise makes some candidates easier to enact. |
| Participation | Joint inquiry can expose differences, while access, power, time, language, and willingness constrain genuine participation. |
| Complementarity | Several Methods can supply distinct contributions, while more methods add joins, effort, and failure opportunities. |
| Reuse and adaptation | Reusable ways make preparation and learning possible, while a local adaptation may change their identity or assurance needs. |
| Timeliness | The receiving decision has a horizon, while a deadline does not make missing premises true. |