---
tag: ABTFRZRK09
kind: concept
name: Generalised logistic function
aliases: [chapman-richards-curve, chapman-richards-function, chapman-richards-model, generalised-logistic, generalised-logistic-curve, generalized-logistic, generalized-logistic-function, generalized-logistic-curve, richards-curve, richards-growth-curve, richardss-curve, richardss-growth-curve]
sources:
  - wikipedia: en:224011@r1340005818
    locator: Generalised logistic function
    note: adopted
    mention: wikipedia://en/224011
    sections: [Summary]
same_as:
  wikidata: Q5532414
  wikipedia: Generalised logistic function
inventory: [ZRXEPVPXQZ]
---

## Summary

The **generalized logistic function** or **curve** is an extension of the logistic or sigmoid functions. Originally developed for growth modelling, it allows for more flexible S-shaped curves. The function is sometimes named **Richards's curve** after F. J. Richards, who proposed the general form for the family of models in 1959.