Overview

software development models

waterfall model
Divided the whole model into parts, we must finish the last task first, before starting the next task. The output of the last task is the input of the next task.
incremental model
Using Waterfall Model iteratively, develop a subset of the whole task, then do it repeatedly.
rapid prototype model
Quickly develop a subset of the program that is usable and deliver it the costumer. Gradually adjusting it according to the customers’ demand.

agile development (敏捷开发), develop in a incremental and iterative way

Testing

Black Box: look from user’s way, is the function can be realized?
White Box: look from inside of the project, check the rightness of each logical point.

Definition

Software engineering is an engineering science that guides the development and maintenance of computer software.

Each stage must have documentation, and each stage will check whether there are problems in the previous stages.

Program is easier to maintain.

The final software product my not meet the needs of users.

use Waterfall Model iteratively

First develop a subset of the system.

Follow the same method to increase system functions.

Quickly build a runnable program and provide it to users.

Adjusting the program, according to users’ changing demands.

Software development in a fast incremental and iterative manner.

planning: collect user stories and split them into little tasks.

design: the principle of keep it simple

coding: pair programming, the task has high technical requirements

test: unit test, continuous integration.

The core is iteration.

only test the system external characteristics

looking from users’ view + equivalence partitioning (等效分区)

every logical point in the program

Huge workload.