---
title: Lecture 11 Design Heuristics 2
sr-due: 2022-04-08
sr-interval: 3
sr-ease: 250
---
#review 

---

# Lecture 11 Design Heuristics 2

## 1 Show system status
- show system stats

- feedback depends on response time
	- <1s just show outcome
	- ~1s feedback that activity is underway
	- >>1s show fractional progress time 

- 0.1 seconds --> feels instantaneusly
- 1 second --> about the limit for flow to be uinteruippted
- 10 seeconds --> the limit for keeping users attention

when:
- when action is requried
- show storage space
- making changes
- next steps --> user input required
- completion --> some task has finished

![](https://i.imgur.com/QzHRh9Z.png)

## 2 familiar metaphors and language
![](https://i.imgur.com/sdNv98E.png)
![](https://i.imgur.com/IbIBK5t.png)

imitating familiar real life

Categories
- good
	- ![](https://i.imgur.com/7wRRBii.png)
- bad
	- ![](https://i.imgur.com/vDKOuOo.png)

## 3 user freedom and control

wan tt ogive th user the feelin thtey can freelyi explore the app
and the freeodm to control i it

- general flow
- undo/redo

e.g., ![](https://i.imgur.com/zF5LDVx.png)
e.g., ![](https://i.imgur.com/eqfs1D6.png)