CSE 503

1
CSE 503 Software Engineering

• instructor Rob DeLine (rdeline_at_cs)
• TA Miryung Kim (miryung_at_cs)
• lectures Mon/Wed 1000-1120am
• web site www.cs.washington.edu/503

2
Shakespeares Hamlet

• HAMLET To be, or not to be that is the
  questionWhether 'tis nobler in the mind to
  sufferThe slings and arrows of outrageous
  fortune,Or to take arms against a sea of
  troubles,And by opposing end them? To die to
  sleepNo more and by a sleep to say we endThe
  heart-ache and the thousand natural shocksThat
  flesh is heir to, 'tis a consummationDevoutly to
  be wish'd. To die, to sleepTo sleep perchance
  to dream ay, there's the rubFor in that sleep
  of death what dreams may comeWhen we have
  shuffled off this mortal coil,Must give us
  pause there's the respectThat makes calamity of
  so long lifeFor who would bear the whips and
  scorns of time,The oppressor's wrong, the proud
  man's contumely,The pangs of despised love, the
  law's delay,The insolence of office and the
  spurnsThat patient merit of the unworthy
  takes,When he himself might his quietus
  makeWith a bare bodkin? who would fardels
  bear,To grunt and sweat under a weary life,But
  that the dread of something after death,The
  undiscover'd country from whose bournNo
  traveller returns, puzzles the willAnd makes us
  rather bear those ills we haveThan fly to others
  that we know not of?Thus conscience does make
  cowards of us allAnd thus the native hue of
  resolutionIs sicklied o'er with the pale cast of
  thought,And enterprises of great pith and
  momentWith this regard their currents turn
  awry,And lose the name of action.--Soft you
  now!The fair Ophelia! Nymph, in thy orisonsBe
  all my sins remember'd.

• OPHELIA Good my lord,How does your honour for
  this many a day?
• HAMLET I humbly thank you well, well, well.
• OPHELIA My lord, I have remembrances of
  yours,That I have longed long to re-deliverI
  pray you, now receive them.
• HAMLET No, not II never gave you aught.
• OPHELIA My honour'd lord, you know right well you
  didAnd, with them, words of so sweet breath
  composedAs made the things more rich their
  perfume lost,Take these again for to the noble
  mindRich gifts wax poor when givers prove
  unkind.There, my lord.
• HAMLET Ha, ha! are you honest?
• OPHELIA My lord?
• HAMLET Are you fair?
• OPHELIA What means your lordship?
• HAMLET That if you be honest and fair, your
  honesty shouldadmit no discourse to your beauty.
• OPHELIA Could beauty, my lord, have better
  commerce thanwith honesty?
• HAMLET Ay, truly for the power of beauty will
  soonertransform honesty from what it is to a
  bawd than theforce of honesty can translate
  beauty into hislikeness this was sometime a
  paradox, but now thetime gives it proof. I did
  love you once.
• OPHELIA Indeed, my lord, you made me believe so.
• HAMLET You should not have believed me for
  virtue cannotso inoculate our old stock but we
  shall relish ofit I loved you not.
• OPHELIA I was the more deceived.
• HAMLET Get thee to a nunnery why wouldst thou be
  abreeder of sinners? I am myself indifferent
  honest

3
Stoppards The Fifteen Minute Hamlet

• HAMLET To be, or not to be that is the
  questionWhether 'tis nobler in the mind to
  sufferThe slings and arrows of outrageous
  fortune,Or to take arms against a sea of
  troubles,And by opposing end them? To die to
  sleepNo more and by a sleep to say we endThe
  heart-ache and the thousand natural shocksThat
  flesh is heir to, 'tis a consummationDevoutly to
  be wish'd. To die, to sleepTo sleep perchance
  to dream ay, there's the rubFor in that sleep
  of death what dreams may comeWhen we have
  shuffled off this mortal coil,Must give us
  pause there's the respectThat makes calamity of
  so long lifeFor who would bear the whips and
  scorns of time,The oppressor's wrong, the proud
  man's contumely,The pangs of despised love, the
  law's delay,The insolence of office and the
  spurnsThat patient merit of the unworthy
  takes,When he himself might his quietus
  makeWith a bare bodkin? who would fardels
  bear,To grunt and sweat under a weary life,But
  that the dread of something after death,The
  undiscover'd country from whose bournNo
  traveller returns, puzzles the willAnd makes us
  rather bear those ills we haveThan fly to others
  that we know not of?Thus conscience does make
  cowards of us allAnd thus the native hue of
  resolutionIs sicklied o'er with the pale cast of
  thought,And enterprises of great pith and
  momentWith this regard their currents turn
  awry,And lose the name of action.--Soft you
  now!The fair Ophelia! Nymph, in thy orisonsBe
  all my sins remember'd.

• OPHELIA Good my lord,How does your honour for
  this many a day?
• HAMLET I humbly thank you well, well, well.
• OPHELIA My lord, I have remembrances of
  yours,That I have longed long to re-deliverI
  pray you, now receive them.
• HAMLET No, not II never gave you aught.
• OPHELIA My honour'd lord, you know right well you
  didAnd, with them, words of so sweet breath
  composedAs made the things more rich their
  perfume lost,Take these again for to the noble
  mindRich gifts wax poor when givers prove
  unkind.There, my lord.
• HAMLET Ha, ha! are you honest?
• OPHELIA My lord?
• HAMLET Are you fair?
• OPHELIA What means your lordship?
• HAMLET That if you be honest and fair, your
  honesty shouldadmit no discourse to your beauty.
• OPHELIA Could beauty, my lord, have better
  commerce thanwith honesty?
• HAMLET Ay, truly for the power of beauty will
  soonertransform honesty from what it is to a
  bawd than theforce of honesty can translate
  beauty into hislikeness this was sometime a
  paradox, but now thetime gives it proof. I did
  love you once.
• OPHELIA Indeed, my lord, you made me believe so.
• HAMLET You should not have believed me for
  virtue cannotso inoculate our old stock but we
  shall relish ofit I loved you not.
• OPHELIA I was the more deceived.
• HAMLET Get thee to a nunnery why wouldst thou be
  abreeder of sinners? I am myself indifferent
  honest

4
Nineteen-lecture software engineering (SE)

• Stoppards play is two complete tellings of
  Hamlet
• The play is 10 scenes in 13 minutes
• The encore is 21 lines in 2 minutes!
• This course is two tellings of SE and its
  research
• The rest of the course is a selection of topics
  in 18 lectures
• Todays lecture is SE research in one lesson!

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The lessons

• Software products are varied, so is development.
• Niche desktop, net, consumer device, command
  control
• Relation to other software first vs nth version,
  member of family
• Seriousness of purpose safety critical,
  prototype, one-use script
• Installation base all consumers, all PC owners,
  company-specific
• Many development activities, many kinds of
  participants.
• What product are we building? What properties
  does it have?
• How do we split the job into manageable pieces?
• How do we realize those pieces?
• Does the product do what we want? Is it of
  acceptable quality?
• How are people using the product? How could it be
  improved?

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The lessons

• SE researchers produce many research products.
• Tools and algorithms, yes, but also...
• Processes, methodologies
• Guidance, recipes, patterns, distilled experience
• Formulas for scheduling, cost estimation, quality
  assessment, c
• Notations, languages, descriptive tools
• Validating a SE invention is often harder than
  inventing it.
• True cost effectiveness typically too hard to
  measure
• Controlled experiments often impossible or too
  expensive
• Ideas need time to develop before validation stage

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Course logistics

• Tentative syllabus on web site
• Focus on skills everyone needs abstraction
  design
• Decompose a problem to simpler problems (problem
  frames)
• Abstract system behavior (relations, state
  machines, processes)
• Decompose systems (architectures, patterns)
• Grading rubric on web site
• Mostly four homework assignments, plus one design
  exercise
• Class participation and reading count!
• Template for reading reviews on web site
• No exams!
• However, we WILL meet during finals week more
  news later