---
title: "DesignOfAnEffect"
description: "one design that reads an effect against the tide: what it needs, what it assumes, when it is used, and what makes its answer cannot tell; the five the model places on the graph, each a row"
section: concepts
address: /concepts/designofaneffect
contract: 0476e35e6e275db5
---

# DesignOfAnEffect

one design that reads an effect against the tide: what it needs, what it assumes, when it is used, and what makes its answer cannot tell; the five the model places on the graph, each a row

[figure: DesignOfAnEffect is a row at platform scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | row |
| scope | platform |
| key | its name |
| store | postgres |
| family | strategy |



## Fields


| field | type | required | note |
|---|---|---|---|
| `name` | `text` | yes |  |
| `order` | `count` | yes | the order of what is built first |
| `needs` | `text` | yes |  |
| `assumes` | `text` | yes |  |
| `when` | `text` | yes |  |
| `estimand` | `text` | yes |  |
| `cannot_tell_when` | `text` | yes |  |
| `reference` | `text` | yes |  |



## Routes that use it
No route takes or returns DesignOfAnEffect directly. The record holds it, and the objects that point at it reach it.