The second milestone is all about finalising the project and making sure we are realistic in the functional, financial and timely aspects. We're always working with the goal in mind: cheap computers for Malawi orphanage, how we get there is just a necessity and the procedure needs to be efficient.

Functional specifications

Things in bold have changed since the original functional specifications.

• External functions (hardware)
  • Cheap
    • About $50 per computer
  • Maintainable
    • Easily exchangeable parts in case something breaks if user maintainable
    • Require only basic tools (fingers, screwdrivers...) to fix broken elements
  • Light
    • About 3Kg per computer
  • Robust
    • Do not break when subjected to light shocks, standard care for sensitive electronics applies
  • Possibility to connect to the Internet
    • Need internet connection for light data exchange (emails, documents)
    • Connection does not have to be permanent
• Internal functions (software)
  • Cheap
    • Open-source and free software only
  • Maintainable
    • System easily updated with a graphical user interface (GUI)
    • Easy installation of new software with a GUI
  • No danger of data loss in case of power outage
    • Backup system that saves a copy of sensitive data
    • Robust against data corruption in case of power-loss
  • Have office tools (text editor, spreadsheets)
    • Google Docs, OpenOffice, LibreOffice...

Selected solution

• Power cable
• Keyboard
• Mouse
• Raspberry Pi 3
• Micro SD card (8GB)
• HDMI-DVI cable
• 5V power supply
• Micro-USB cable
• Audio cable
• Screen

Costs

One station will cost $62 and weigh about 8.5Kg. To this must be added the transport costs with add another $100, so total cost is $286 for three systems as the weight limit is 28Kg. With this system we achieve 25% of maximum fitness.

Planning

Gantt chart has not changed since last time. The second milestone log is late, however the project itself is well within limits and going strong.