ITEC 3010 Lecture Notes - Lecture 5: Pseudocode, Data Mining, Data Flow Diagram

• School: York University
• Department: Information Technology
• Course: ITEC 3010
• Professor: Luiz Cysneiro

Document Summary

English/pseudocode i. e. pseudocode for payroll function (hours>40, then overtime: graphical, diagrams/representations of the system. It"s a very vague system: easier to showcase complex relationships of abstract things (processes, data, messages, etc, abstract models are used during analysis phase, concrete models are used during design phase. Identifying events: difficulty when distinguishing event from responses/conditions, events occur in intervals. External events for rmo case: cx checks item availability, places order, changes order, check order status, change account info, return item, shipping fulfills order, identifies back order, merchandising updates catalog, create new catalog. Temporary events for rmo case: produces regular reports/statements at certain times, order summary report, transaction summary, fulfillment summary, catalog activity report. Looking at each event: event table: lists and provides info about events in a table i. e. cx checks item availability, composed of, the trigger: tells the system that event has occurred (data needs processing) Item inquiry: the source: external agent/actor that supplies data.