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estimate what’s left What do the spike test results tell you? Your tests gave you an idea as to how much of your code was failing. With the results of your spike test, you should have an idea about how long it will take to fix the remaining bugs. The number of bugs fixed during the week-long spike test 4 0.8 402 Chapter 11 / 5 = 0.8 bugs per day You can then figure out how long it will take for your team to fix all the bugs Your bug fix rate. The number of work days in the spike test The bugs left, after you fixed some on the spike test. Your team’s bug fix rate for the spike test X 13 - 4 = 7 days So we fixed some bugs AND we now know how long it will take for the entire team to fix all the problems. But I’m still not feeling very confident... Download at WoweBook.Com How long it would take your whole team to fix all the remaining bugs
Hmm, are you sure a team will always squash bugs like they did in the spike test? How can you have any confidence that you’ll fix all the bugs in seven When it comes to bug fixing, we really can’t be sure When it comes down to it, a spike test really only gives you a more accurate estimate than a pure guess. It’s not 100% accurate, and may not even be close. But the spike test does give you quantitative data upon which you can base your estimates. You know how many bugs you fixed, and it was a random sample, so you can say with a certain degree of confidence that you should be able to fix the same number of further bugs in roughly the same amount of time. However, a spike test does not give you any qualitative data. This means that we really only know how fast you can fix the bugs that we just worked on. We don’t really know how bad things might be in stuff waiting to be fixed. There’s still the potential for a bug to be in Mercury Meals that will blow your estimate out of the water, and unfortunately, that’s a fact of life when it comes to bug fixing, especially on third-party software. Download at WoweBook.Com bugs you are here 4 403
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Download at WoweBook.Com
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Praise for Head First Object-Orient
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Other related books from O’Reilly
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Head First Software Development by
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the authors Author(s) of Head First
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table of contents x 1 If The Goal g
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table of contents xii 3 project pla
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table of contents xiv 5 good-enough
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table of contents xvi 6 / It buildi
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table of contents xviii 8 Sometimes
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table of contents xx 10 Think the n
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table of contents xxii 12 You’ve
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table of contents xxiv ii appendix
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how to use this book Who is this bo
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how to use this book xxviii intro W
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how to use this book Here’s what
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how to use this book Read Me This i
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the review team The technical revie
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safari books online Safari® Books
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Tom’s Trails Tom’s Trails is go
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the Big Bang approach The Big Bang
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the Big Bang ends with a big mess B
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great software development is... 8
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delivering with iteration Getting t
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an iteration delivers working softw
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an iteration is a complete developm
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uild a plan out of iterations and f
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deciding on a iteration tempo for y
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change happens The customer WILL ch
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handle change with iteration Iterat
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use the right process for you The r
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CHAPTER 1 your software development
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exercise solutions 28 Chapter 1 1 P
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orion’s orbits Orion’s Orbits i
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equirements start with customer ide
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capturing what’s in your customer
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getting more with role playing and
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customer-oriented requirements Our
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keep your customer in the loop Q: W
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user stories capture what your soft
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estimates come with assumptions 44
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assumptions kill confidence in your
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highlighting assumptions and obtain
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assumptions are killed or become ri
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use your customer effectively 52 Ch
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keep estimates small A BIG user sto
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aim for estimates you and your team
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your estimates are your promise Q:
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develop your estimates cyclically T
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sum your estimates to find out your
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when your project is too long 64 Ch
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deliver what you can, when it’s n
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priorities come from your customer
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Title: Description: Est: Title: 15
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factoring in team performance 76 Ch
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uilding achievable milestones Work
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your customer decides priority Titl
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milestone = paid, iteration = on tr
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continuously buildable and runnable
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inging reality to your plan 86 Chap
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velocity applies your real performa
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from ideal to real estimates Progra
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confidence comes at a price When is
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iterations with velocity The maximu
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eality means being honest Title: Es
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eaking realistic but bad news Manag
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introducing the big board The Big B
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happiness is a project that can be
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performance and burn down Work left
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introducing iSwoon Introducing iSwo
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eak up user stories into tasks Task
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tasks have estimates Your task desc
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tasks on your board Add your tasks
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moving tasks to in progress Start w
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multiple tasks at the same time Wha
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keep communication flowing with dai
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doing your first task Task 1: Creat
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inging your design to life with a s
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exercise solution The date is asked
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monitoring your progress Standup me
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updating your project board 132 Cha
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updating your project board 134 Cha
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into the second week Standup meetin
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detecting problems with the design
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surprises... 140 Chapter 4 We inter
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dealing with unplanned tasks If the
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velocity doesn’t account for surp
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you know where you are We have a lo
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meet velocity Head First: Welcome,
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inging iSwoon under control iSwoon
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detecting bad design ...you needed
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design refactoring The Date class c
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srp analysis Spotting multiple resp
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single responsibility It makes sens
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don’t repeat yourself Your design
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efactoring iSwoon’s design A date
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standup meeting The post-refactorin
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unplanned work Unplanned tasks are
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good-enough delivers “Good Enough
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end of iteration board When everyth
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exercises 172 Chapter 5 Take each o
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exercise solutions Unplanned tasks
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introducing beatbox pro You’ve go
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digging into code Here’s the code
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finish the story And now the GUI wo
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merging changes And Bob does the sa
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disaster recovery What went wrong?
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version control in action Let’s s
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1 2 creating a repository First set
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merging changes Most version contro
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identifying conflicts If your softw
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esolving conflicts Make these chang
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dealing with older code More iterat
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dealing with multiple releases We h
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viewing logs Good commit messages m
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tagging revisions (Emergency) stand
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anches and tags 1 Use the mkdir com
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working with branches Fixing Versio
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anches, tags, and subversion Q: I
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avoiding unnecessary branches When
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214 Chapter 6 What version control
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CHAPTER 6 Development Techniques Us
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uilding buildable software Develope
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introducing ant Ant: a build tool f
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more exercises 224 Chapter 6 ½ Are
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a full build script The javac task
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habits of good build scripts Good b
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even more build script tricks Good
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version control your build script Y
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CHAPTER 6 1/2 Development Technique
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it never rains but it pours Things
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lack box testing There are three wa
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grey box testing Grey-box testing g
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white box testing was Below is a us
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testing functionality BeatB These s
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you create tests test for establish
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one-click testing Testing EVERYTHIN
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making the most of a framework Auto
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continuous integration For you and
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setting up continuous integration A
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tests only cover what you tell them
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tested code is completed code } 258
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putting code to the test 260 Chapte
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100% coverage All three of these te
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using a coverage report Testing all
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the cost of testing Q: How do cover
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is 100% coverage efficient? 268 Cha
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an environment for testing 270 Chap
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exercise solutions 272 Chapter 7 Te
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test before code Test FIRST, not la
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unit testing Your first test... The
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green means pass Get your tests to
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testing a user story’s functional
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implement a test in code import org
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drive your code with TDD In TDD, te
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task done when tests pass Completin
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first fail Red: write (failing) tes
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keep it simple You can just make up
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simple code is testable code Always
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switching to test code with the str
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where to place your test code Remem
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etter code through testing Testing
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tests = code and lots of it More te
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mock objects We need lots of differ
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using a mock object framework Mock
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why mock objects? Q: These mock obj
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all green, you’re done It’s not
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test, red, code, green A day in the
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esults from an iteration Your itera
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daily standup meetings Standup Meet
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urn-down analysis 322 Chapter 9 Bef
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system testing System testing MUST
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incorporating system testing System
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issues with test iterations More it
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enabling communication 330 Chapter
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This is usually called acceptance t
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filing and fixing a bug The life (a
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ug trackers So you found a bug....
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learn from your iteration But there
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different project hurdles 340 Chapt
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iteration reviews Time for the iter
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other things to do A GENERAL priori
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CHAPTER 9 346 Chapter 9 Tools for y
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crossword solution 13 B 1 S Iterati
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an iteration finishes with more tha
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Page 392 and 393: uilding your board for the next ite
Page 394 and 395: uilding your board for the next ite
Page 396 and 397: factoring in real velocity Q: A tea
Page 398 and 399: the customer still rules And it’s
Page 400 and 401: it’s still software Someone else
Page 402 and 403: integration tasks on your board Tit
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Page 406 and 407: euse means trust too //... 368 Chap
Page 408 and 409: when reuse lets you down Testing yo
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Page 412 and 413: looking for problems in reused sour
Page 414 and 415: finding problems in reused source c
Page 416 and 417: your process deals with it You with
Page 418 and 419: oken code happens � � � � Q
Page 420 and 421: exercise solutions 2 R 1 R 3 E S P
Page 422 and 423: At the end of the last chapter, thi
Page 424 and 425: always communicate First, you’ve
Page 426 and 427: prioritize what you do 388 Chapter
Page 428 and 429: ump some things for later 390 Chapt
Page 430 and 431: apply your process Priority one: ge
Page 432 and 433: focus on functionality We could fix
Page 434 and 435: test for bugs Figure out what funct
Page 436 and 437: think about estimating Even though
Page 438 and 439: spike tests Spike test to estimate
Page 442 and 443: factor in confidence Your team’s
Page 444 and 445: always communicate Give your custom
Page 446 and 447: apply other techniques Figure out w
Page 448 and 449: successful deliveries matter Things
Page 450 and 451: functionality wins most importantly
Page 452 and 453: CHAPTER 11 414 Chapter 11 Tools for
Page 454 and 455: crossword solution 10 F 15 H 5 P Bu
Page 456 and 457: software process defined Pinning do
Page 458 and 459: evaluate everything The big board 4
Page 460 and 461: ensure changes improve things The b
Page 462 and 463: formalize if necessary Formal attir
Page 464 and 465: other resources Some additional res
Page 466 and 467: CHAPTER 12 428 Chapter 12 Tools for
Page 468 and 469: exercise solutions 4 S 11 P 14 A So
Page 470 and 471: Download at WoweBook.Com
Page 472 and 473: uml and class diagrams #1. UML clas
Page 474 and 475: sequence diagrams #2. Sequence diag
Page 476 and 477: user stories and use cases #3. User
Page 478 and 479: system testing vs. unit testing #4.
Page 482 and 483: CHAPTER 1 development techniques CH
Page 484 and 485: development principles Deliver soft
Page 488 and 489: the index building projects (contin
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the index H Head First Java BeatBox
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the index No Dumb Questions (contin
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the index singularly focused 152 so
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the index third-party code bugs in
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