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Table of Contents

• Glossary
  • Second system effect

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Glossary

• Blackbox monitoring
• Conceptual integrity: "It is better to have a system omit certain anomalous features and improvements, but to reflect one set of design ideas, than to have one that contains many good but independent and uncoordinated ideas." (Fred Brooks)
• End-to-end principle: "application-specific features reside in the communicating end nodes of the network, rather than in intermediary nodes" (end-to-end principle - Wikipedia)
• NIHITO (Nothing Important Happens In The Office): you need to learn from your customers and from the market first.
• Stability is the sensitivity to change of a given system that is the negative impact that may be caused by system changes (ISO/IEC 9126 standard on evaluating software quality).
• Reliability is made of maturity (frequency of failure in software), fault tolerance (ability to withstand failure) and recoverability (ability to bring back a failed system to full operation) (ISO/IEC 9126 standard on evaluating software quality).
• Two Generals' Problem: "a thought experiment meant to illustrate the pitfalls and design challenges of attempting to coordinate an action by communicating over an unreliable link" (wikipedia).
• Whitebox monitoring
• Law of Demeter: only talk to your immediate friends (wikipedia)

Second system effect

"The second-system effect (also known as second-system syndrome) is the tendency of small, elegant, and successful systems to be plagued with feature creep due to inflated expectations." (wikipedia)