---
alias: user-guide-checklist-instance-index
description: "A checklist instance represents an active, self-contained object linked to its parent checklist"
---

# Checklist Instance

:lock: ChecklistInstance.**Show**

A **Checklist Instance** is an active object that is created based on the **Checklist**, and it has a lifetime which is independent from the **Checklist** definition.

## Tying Everything Together

```mermaid
graph LR
    Main[Checklist]
    A2[Maintenance Activity Order] --- L1
    Main === L1[Checklist Instance]
    N1[Protocol Instance Path] --- L1
    A3[Material] --- L1
    L1 === L2[Checklist Instance Item]
    L2 === L3[Checklist Instance Item Parameter]
   
classDef mermaid_title color:#000, fill:#fafafa, stroke:#fafafa, stroke-width:0x, font-size:100%, font-weight:200;
classDef mermaid_start color:#000, fill:#fafafa, stroke:#fafafa, color:#fafafa, stroke-width:0x, font-size:100%, visibility: hidden;
classDef mermaid_businessdata color:#000, fill:#65CDE8, stroke:#65CDE8, stroke-width:0px, font-size:100%;
classDef mermaid_nonbusinessdata color:#000, fill:#B7DEE8, stroke:#B7DEE8, stroke-width:0px, font-size:100%;
classDef mermaid_entity color:#000, fill:#FB9F53, stroke:#FB9F53, stroke-width:0px, font-size:100%;
classDef mermaid_entitylinked color:#000, fill:#FCD5B5, stroke:#FCD5B5, stroke-width:0px, font-size:100%;
classDef mermaid_context color:#000, fill:#B9CDE5, stroke:#B9CDE5, stroke-width:0px, font-size:100%;
classDef mermaid_optional color:#000, fill:#B7DEE8, stroke:#65CDE8, stroke-width:1px, font-size:100%, stroke-dasharray: 5 5;
class Main mermaid_entity
class A1,A2,A3,A4,A5,A6,A7,A8,A9,A10,A11,A12 mermaid_businessdata
class L1,L2,L3,L4,L5,L6,L7,L8,L9 mermaid_entitylinked
class C1,C2,C3,C4,C5,C6 mermaid_context
class N1,N2,N3,N4,N5,N6 mermaid_nonbusinessdata

click Main "../../checklist"
click A2 "../../maintenance-activity-order"
click A3 "../../material"
```

{{ generate_index() }}