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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 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 What was great … Big effort of many students Large time investment Interactive Good questions in the forum High participation during project Some excellent work sessions Well designed databases Great bots Good understanding of RegExp Remember: Learning RegExp is for life :-) No server crashes (knock on wood! :-) … 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!) … and what was bad Deadlines not respected (by 42%) 42% 21% for phase 1 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) 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 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 … Tips for the remaining phases Read No, not just skim, read Use the documentation (Postgres, J2EE) Don’t be afraid to try new things Very useful and important for future projects Indispensable in real life “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 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 Have a good start for phase 2!