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Commit 548d71bd authored by Alexander Hirsch's avatar Alexander Hirsch
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Add techniques

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slides/techniques_slides.md 0 → 100644
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% Techniques
% Alex Hirsch
# Planning
## Meet the Problem
![](images/problem-1.svg)
## Analysis
- Understand the problem
- Relation to similar problems
- Existing solutions
## Dissecting
- Break a big problem into smaller problems
- Often pieces share similarities
- `goto Analysis`
---
![](images/problem-2.svg)
---
![](images/problem-3.svg)
## Problem Description
- Document fully describing the problem
- Mentions every detail discovered
- Result of your analysis process
## Solution
- Start with the big picture
- Block diagrams
- UML
- Define modules
- Purpose
- What to cover
- Define module interaction
- Interfaces between modules
---
- Go through each module
- Critically think about its tasks
- How can it be realised?
- What problems could emerge?
- How does data flow through this module?
## Solution Specification
- Document fully describing the solution
- May contain lots of details
- Needs to communicate the big picture
- Consider it a guide for implementing
## Manging Time
- Split the implementation work into small, manageable tasks
- Critically think about relation ships between tasks
- Does feature A depend on feature B?
- Consider which resources are needed for each task
- Do we need special equipment?
- Who will work on this?
- *Maybe* add time estimates to tasks
## Gantt Chart
![Src: teamgantt.com](images/gantt_chart.png)
## Iterating
- Problem changes over time
- Solution has shortcomings
- Resource situation changes
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- Update problem description
- Make changes to your solution specification
- Update your management plane accordingly
- Flexibility is paramount
This commonly decides between success and failure.
# Software Architecture
## Modules
- Each module should fulfil a specific purpose
- *Separation of Concerns*
- Modules interact with each other to achieve greater tasks
- Interface of a module
- Module dependencies
- Level of abstraction (high-level vs. low-level)
## Interfaces
- Multiple components need to work together
- Smaller interfaces provide more flexibility
- *Loose coupling*
- Need to be clearly defined
- Should be free from implementation details
## Abstractions
If things get to complicated, adding another layer may help.
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![](images/abstraction-1.svg)
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![](images/abstraction-2.svg)
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- Sometimes introduces more code
- Ensure trade-off is worth it
- Details become less obvious
- The devil is in the detail
- Think in layers
- How far am I from the lowest level
> You aren't gonna need it
## Cross Layer Interaction
![](images/cross_layer_interaction.svg)
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