---
title: "LayStrategyInput"
description: "a strategy laid over a twin: its armed plays become the interventions of one simulation"
section: concepts
address: /concepts/laystrategyinput
contract: 0476e35e6e275db5
---

# LayStrategyInput

a strategy laid over a twin: its armed plays become the interventions of one simulation

[figure: LayStrategyInput is a value at none scope. The drawing shows its fields and the objects that they point at.]

| property | value |
|---|---|
| kind | value |
| scope | none |
| key | none |
| store | none |
| family | harness |



## Fields


| field | type | required | note |
|---|---|---|---|
| `twin` | `id` | yes |  |
| `strategy` | `id` | yes |  |
| `horizon` | `duration` | no |  |
| `samples` | `count` | no |  |
| `seed` | `count` | no |  |



## Routes that use it
- [`/v1/work/lay_strategy`](/reference/work/lay_strategy) takes it as input