42889 iOS Application Development
41889 App Development in the iOS Environment

Lecture 9 - Project Management

UTS: Faculty of

Engineering and

Information Technology

UTS CRICOS Provider Code: 00099F

Software Project Management

Lifecycle of a feature

Lifecycle of a bug

How to review code

Software complexity

**Reliable software is possible.**

> Most programming environments are meta-engineered to make typical software easier to write. They should instead be meta-engineered to make *incorrect* software *harder* to write.

– [Ten years of qmail 1.0](http://cr.yp.to/qmail/qmailsec-20071101.pdf), by Daniel J. Bernstein

> The AXD301 has achieved 99.9999999% reliability. Why is this? No shared state, plus a sophisticated error recovery model.

– [What's all this fuss about Erlang?](https://pragprog.com/articles/erlang/), by Joe Armstrong

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**Reliability is not emphasised by most business models.**

- [Knight Capital Says Trading Glitch Cost It $440 Million](https://dealbook.nytimes.com/2012/08/02/knight-capital-says-trading-mishap-cost-it-440-million/)
- [Sudden Unintended Acceleration](https://en.wikipedia.org/wiki/Sudden_unintended_acceleration)
- [Therac-25](https://en.wikipedia.org/wiki/Therac-25)

Simplicity and Learnability

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42889 iOS Application Development 41889 App Development in the iOS Environment