CS 350, slide set 2ReadingPlanningWeekly Activity SummaryExample: time logSlide 6Example (cont.)Assignment:Product PlanningJob number logJob Number ExamplePartial example: programming data onlyQuick Survey ResultsCommentsUnits for readingPlot of reading timesPlot of programming time, C++ ObjectsUnits for programmingWhat’s an LOC?Basic metricsEstimating BackgroundSize Estimating Principles - 1Planning Forms, assignment 1Defect Record Log (pg 47) - 1Defects - 2Time Recording LogTest PlanProject Plan SummarySize Estimating Principles - 2Slide 30ReminderSize Estimating Principles - 3Estimating ApproachesDelphi Size EstimatingDelphi Example - 1Delphi Example - 2Delphi Size Estimating - 2Fuzzy Logic Size Estimating - PreparationFuzzy Logic - stepsA Fuzzy Logic Example - 1A Fuzzy Logic Example - 2A Fuzzy Logic Example - 3A Fuzzy Logic Example - 4A Fuzzy Logic Example - 5One more thingTo estimate size of new projectFuzzy Logic Size Estimating - AdvantagesFuzzy Logic Size Estimating - DisadvantagesFuzzy Logic Sizes for C++, LOC per methodAnother widely used time estimation methodSo back to units for programsWhat did I not tell you?Things to Remember about Size & Time EstimatesCS 350, slide set 2M. OverstreetOld Dominion UniversitySpring 2005ReadingPSP text, ch. 4, 5, 6PlanningPeriod plansHow shall I spend my time?Schedule orientedProduct plansWhat are we going to do over the next several weeks?Activity orientedFor any project, these 2 plans are coupledWeekly Activity SummaryFirst step in period planning:Understand how you spend time currentlyStart with Time Recording LogTransfer to Weekly Activity SummaryExample: time logdate start stop int. timedelta activity commentsC U1/26 2:00 p 4:25 p 15,5 125 Read T Read chap 4, 5 x 21/27 5:45 p 7:05 p 80 Class Lect, chap. 4, 5 x 11/28 8:45 p 10:20 p 3,3,4 95 Read S Read Prog 1 req.1/28 10:00 p 10:30 p 30 Prog Prog 1 design1/28 10:30 p 11:05 p 35 Read T Read chap. 6 x 11/30 5:30 p 6:35 p 5 55 Prog Code prog. 11/30 8:45 p 9:20 p 3 30 Prog Test data for p.11/30 9:30 p 9:50 p 20 Prog Code prog. 11/30 9:50 p 10:25 p 35 Prog Comp & test p. 1 x 11/29 5:45 p 7:00 p 75 Class Lect. ch 5 & 6 x 11/31 4:00 p 4:45 p 45 Read T Read chap. 7 x 1Task Date Class Write ProgQuiz PrepRead TextStudySpecTotalSun 1/26 125 125Mon 80 80Tu 30 35 95 160Wed 75 75Th 140 140FriSat 45 45Totals 155 170 205 95 635Example Weekly ActivitySummaryComments: 1. numbers made up 2. recall rule-of-thumb: spend 2 hrs out of class for each hr in classExample (cont.)Total 150 0 25 145 0 420Avg. 150 0 25 145 0 420Max. 150 0 25 145 0 420Min. 150 0 25 145 0 420Previous Week’s TimeTotal 305 170 25 360 95 1055Avg. 152 170 25 175 95 522Max. 155 170 25 205 95 635Min. 150 170 25 145 95 420Task Class Wrt P Quiz Read T Read S Total Current Week’s TimesSemester total, avg,max & min!Ignore 0’s!Assume wehave onlyone weekAssignment:Pg. 43.Due next Wed., Jan. 26.Must mail to [email protected] PlanningSome definitionsProduct: something you produce, usually for someone elseProject: produces a productTask: an element of workProcess: the steps to produce a productPlans: the way a specific project is to be done; how, when, who, at what costsJob: something you do; either a project or a taskJob number logUsed to record estimated and actual timesUsed for product planningGoal: to have personal data on how long certain types of activities takeMust be based on sizeMaybe lots of other factors, but we start with sizeUsed as key input for future time estimatesJob Number ExampleSee detailed example, pg. 50 based on time log, pg. 51Detailed instructions, pg. 52See detailed term def’ns, pg. 53Partial example:programming data onlyJob Date Estimated Actual To date # Time Units Time Units Rate Time Units Rate Max Min1 2/9 120 60 168 87 0.52 168 87 0.52 0.52 0.52 Description: write program 1 (minutes per program)... (other activities types, so omitted on slide)3 2/15 205 148 245 133 0.54 413 220 0.53 0.53 0.52Description: write prog. 2...6 2/24 150 87 145 59 0.40 558 279 0.50 0.53 0.40 Description: write program 310 3/6 175 95 230 104 0.45 ___ __ ___ ___ ___ Description: write prog. 4Quick Survey ResultsWhat’s best prog. language?a. C++ 24b. Java 1c. Perld. Visual Basic 2e. Other 1You prefer to use:a. C++ 24b. Java 1c. Other 3Your largest program:a. < 500 loc 1b. > 500 & < 1 kloc 10c. > 1 & < 10 kloc 11d. > 10 & < 100 kloc 5e. > 100 kloc 1What’s a kloc?a. comments inc.? 5b. declarations? 4c. only exec. stmts? 14d. number of CRs? 5Mail to [email protected]After a while, you will have data onprogrammingavg, min, max(really need better units than “program”)Time to read a text chapterbetter units are probably pages rather than chaptersAnd other activitiesThis can help with time estimates for future similar tasksUnits for readingTable 6.1 has student data on minutes/page.Note varianceminutes/page varies from 3.3 to 7.4 for this studentStill, can be helpful to distinguish between time to read large chapter and time to read small.Plot of reading timesPlot of programming time, C++ ObjectsUnits for programmingLOC looks like a good predictor of timeIt is. Not perfect, but lots of studies show a strong correlation between LOC and development timeThe problem is we only know LOC when we’re done. We’re looking for something to predict the time required for a task.So don’t know LOC when we need themA solution is discussed laterWhat’s an LOC?Depends on formattingSee text for examplesDepends on what you countComments?Only executable lines?Compiler directives?Basic metricsFor our purposes LOC:As long as you are consistent, it will workFor CS 350, use "grep ";" *.h *.cpp | wc –l"Why? it's easy and good enough. then we all do it the same way.Basic productivity measure is LOC/hrUsually misleading to compare your numbers and my numbersCount loc differentlyLikely depends on problem domainDepends on what’s