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Introduction to Information Systems Project

Introduction to Information Systems Project. Debriefing Phase 1. Overview. General Problem analysis Database design Data extraction Technical SQL & PostgreSQL Regular expressions Java JDBC. Main problems in phase 1. Finding correct mappings Real world  Abstract schema

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Introduction to Information Systems Project

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  1. Introduction to Information Systems Project Debriefing Phase 1

  2. Overview • General • Problem analysis • Database design • Data extraction • Technical • SQL & PostgreSQL • Regular expressions • Java • JDBC

  3. Main problems in phase 1 • Finding correct mappings • Real world  Abstract schema • Abstract schema  Database schema • Use of suitable data types • Not everything is a varchar … • Writing documentation • Good documentation helps yourself understand code you wrote 4 weeks ago … • … and it helps us understand your work

  4. What was great … • Big effort of many students • Large time investment • Interactive • Good questions in the forum • High participation during project sessions • Some excellent work • Well designed databases • Great bots • Good understanding of RegExp • Remember: Learning RegExp is for life :-) • No server crashes (knock on wood! :-)

  5. … what was not so great … • Too many questions via e-mail. Use the forum instead, so everybody can profit! • Slight asynchrony between course and project (our fault, sorry!)

  6. … and what was bad • Deadlines not respected (by 42%) • 42% for phase 1 • 21% for report URLs • Hand-ins in wrong formats • Database dumps in HTML or PDF • People don’t read the web site • Wealth of information available • Skimming is not enough • Minimalist reports • Half a screen page for five weeks • Incomplete (missing graphics and explanations)

  7. Phase 1 in Numbers • 54 students • 19 groups in 6 consortia • Some 200 e-mails • One group had • 147,460 albums with 1,874,842 songs • 68 MB database • >45 GB traffic in one day (EPFL average is 183 GB/day) • Average grade: 4.4

  8. What will change • Strict deadlines • 10% deduction per day (5 minutes late = 0.5 points less) • Exponential deduction for repeating offenders • Valid XHTML required • 0.5 points deduction if invalid • Use XHTML validator at: http://validator.w3.org/ • “Checklist” for hand-ins • Pure courtesy, don’t expect this in real life …

  9. Tips for the remaining phases • Read • No, not just skim, read • Use the documentation (Postgres, J2EE) • Very useful and important for future projects • Indispensable in real life • Don’t be afraid to try new things • “Learning by doing” – Writing stuff from scratch instead of extending sample code takes more time but pays off • Use the forum … • … to ask questions, • … to learn from other people’s problems

  10. What could change • Your critique? • Problems? • Feedback? • Now’s the time • Also by e-mail or in person • Constructive feedback is always well received, positive or negative

  11. Have a good start for phase 2!

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