UML Use Case Modeling Vn

8/8/2019 UML Use Case Modeling Vn

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MM HNHHNH HAHA UU SESE CC ASEASEHoang Huu Hanh (PhD), Hue Universityhanh-at-hueuni.edu.vn


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NN ii dungdungy Use Case l g?y L i ch c a Use Casey Use Case vs. Ti li u yu c uy M hnh ha Use Case

H th ng - SystemTc nhn - Actor

Use CaseQuan h gi a cc Use Casey V d : TVR S Use Case

2Use Case Mo delingBased on tutor ials and prese ntat ions of Rat ionals UML webs ite


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Use CaseUse Case ll gg??y c xu t b i Ivar Jacobson (1994)y L m t kh i ch c n ng c th c hi n

b i h th ng mang l i mt k t qu cgi tr i v i mt actor no

y Tr l i cu h iH th ng s lm g theocch nhn c a ng i s d ng

y L t p cc k ch b n c a ra d avo cc yu c u chung c a ng i sd ng

y M hnh ha Use Case khng ph i lm t k thu t m hnh ha h ng it ng

3Use Case Mo deling


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LL ii chch Use CaseUse Casey N m b t cc yu c u v ch c n ng

t kha c nh ng i dngy M t r rng v ph h p nh ng g h

th ng c n lmy L c s ki m nh h th ngy Gip cho vi c a cc yu c u h

th ng thnh cc l p v cc hm ch cn ng vo h th ng

4Use Case Mo deling


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LL ii chch Use CaseUse Casey ng vi tr nh l m t n v c b n

dng nh giy L n v c phn tch nh nh t

E ach increment that is planned anddelivered is described in terms of the UseCase that will be delivered in that

increment

5Use Case Mo deling


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Use CaseUse Case vv cccc yuyu cc uuy M t ti li u yu c u cho bi t nh ng g h

th ng s th c hi n. Use Case m t nh ngho t ng m ng i s d ng th c hi n vnh ng p tr t ng ng c a h th ng

y

i khi Use Case c xem nh l m t suylu n t nh ng yu c uy Cc yu c u s c l p ti li u hi u qu

b ng cc Use CaseT ng kh n ng tm v tGip cho vi c xc th c yu c u ng i dng vch c n ng c a h th ng d dng h nGip cho vi c phn lo i ng i s d ng th cngCng c tm cc l p

6Use Case Mo deling


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Use CaseUse Case vv cccc yuyu cc uuy Use Case khng ph h p cho vi c

xc nh cc yu c u phi ch c n ngc a h th ng

y Use case c xem nh l m t ph nc a vi c c t cc yu c u h th ng

7Use Case Mo deling


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BiBi u u Use CaseUse Casey M hnh Use Case c m t trong

UML b i mt hay nhi u bi u UseCase (UCD)

y M t bi u Use Case bao g m 4thnh ph n chnh:M t h th ngCc tc nhn m h th ng t ng tcCc UC, ho c d ch v m h th ng th chi nM i quan h gi a cc thnh ph n trn

8Use Case Mo deling


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HH thth ngngy L m t ph n c a m hnh Use Casey R anh gi i c a h th ng m ta mu n pht tri n c n

ph i c nh ngh a r rngy H th ng khng c n thi t l mt h th ng

ph n m my nh ngh a cc vng bin quan tr ng c a hth ng

Nh ng tc v no c th c hi n t ng ho cth cng?Nh ng tc v no c th c hi n b i cc hth ng khc?x T t c cc gi i php c a ra ph i n m trong vng

bin c a h th ng

9Use Case Mo deling


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HH thth ngngy M t h th ng trong bi u Use Case

c m t nh m t h p hnh kh iy Tn c a h th ng c hi n th bn

trong ho c trn h p hnh kh i

Traffic Violations Report System

10Use Case Mo deling


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Tc nhnTc nhny L ci g ho c ai t ng tc v i h th ng (trao

i thng tin v i h th ng)y Tc nhn m t v i di n cho mt vai tr,

ch khng ph i l m t ng i s d ng th t sv c th c a h th ngy V d :

Nhn vin (Clerk)Nh p d li uNg i gim st (Supervisor) Cho php hi uch nh/xa d li uNg i qu n l (Manager) Cho php xem ccphn tch

y M t ng i s d ng n l c th c nhi uh n m t vai tr



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Tc nhnTc nhny Tc nhn c m c ch:

Add a TrafficViolationLookup a TrafficViolation

y Tc nhn khng nh t thi t l con ng iC th l m t h th ng bn ngoi t ng tcv i h th ng chnh

y M i tc nhn u c tn, ph n nh vai

tr c a tc nhny M t use case lun c kch ho t b i

m t tc nhn no

1 2Use Case Mo deling


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K hiK hi u tc nhnu tc nhn

Clerk

>

Clerk



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MM i quan hi quan h gigi a cc tc nhna cc tc nhny K hi cc tc nhn v i t ng vai tr c mnh, nh m th c hi n

m t vai tr khi qut h n th vai tr c m t nh m ts khi qut chung c a t ng vai tr ring bi t

y Nh ng hnh vi chung c a cc tc nhn s c m t l pcha

y Cc tc nhn k th a cc hnh vi c a l p tc nhn cha vm r ng nh ng ch c n ng m l p cha khng c

y Cc tc nhn khng nh t thi t lc no c ng c quan h v inhau

Clerk SupervisorManager



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X c X c nh tc nhnnh tc nhny Ai s d ng ch c n ng chnh c a h

th ng?y Ai s duy tr, qu n l v gi cho h th ng

lm vi c?y Nh ng ph n m m/h th ng khc m h

th ng c n t ng tc?Nh ng h th ng my tnh khcNh ng ng d ng khc ch y trn cng m tmy tnh (i.e. X client/server)Ch : trnh nh m l n gi a s t ng tc(interaction) v i u vo (input)



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X c X c nh tc nhnnh tc nhny L ai

S d ng h th ng?Ci t h th ng?

K h i ng h th ng?Duy tr h th ng?Thot h th ng?Thu th p thng tin t h th ng?

Cung c p thng tin cho h th ng?y Chuy n g x y ra t i mt th i i m nh

tr c?



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ThTh i gian?i gian?y Xem th i gian nh l m t tc nhny Tc nhn th i gian c th kch ho t

m t Use Case



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Use CaseUse Casey M t m t ch c n ng hon ch nh theo

quan i m c a m t tc nhnM t UC th a mn m t m c ch no

c a tc nhny Lun c kch ho t b i m t tc nhny M t UC cung c p m t gi tr cho mt

tc nhny M t UC ph i hon ch nh

Trnh phn r UC thnh cc UC nh h nb sung cho nhau (phn r ch c n ng)



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Use Case ( cont.)Use Case ( cont.)y Cc k ch b n c a UC th ng c m

t d i d ng v n b nc t n gi n v nh t qun cch th c m

tc nhn v h th ng t ng tc v i nhauM u m t UC (Use Case DescriptionTempate

y M t theo m c nh c a ng i sd ng v s tr l i c a h th ng

K hng s d ng cc y u t cng ngh , trnhch ti t ho cc c ch , c bi t l lin quan

n cc giao di n



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MM uu mm tt UCUCTn (Name)x Tn c a UC, c ngh a g n v i m c ch ng i s

d ngCc tc nhn (Actors)M c ch (Goals)Cc yu c u (Requirements) (ty ch n)x Cung c p kh n ng l n v t

i u ki n tin quy t (Pre-Conditions)x Cc i u ki n c n thi t c n ph i c tr c khi th chi n m UCx C th l m t UC khc (khng gi ng v i quan h

)



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BiBi u mu m u m tu m t UCUCy M t (Description)

M t cc ti n trnh c b n ho c bnh th ng c a h th ngn u h th ng ho t ng nh d nh (m i th i u ng)

y i u ki n sau (Post-conditions)Tr ng thi c a h th ng sau khi UC c th c thiCc gi tr a ra cho cc tc nhnPhn bi t gi a bi n th v cc ngo i l

y Cc bi n th (Variations)Cc i u ki n d n t i vi c phn nhnhM t cc ti n trnh thay th ho c l tn m r ng c a UC

y Cc ngo i l (Exceptions)Nh ng i u ki n khng mong i d n t i vi c phn nhnh(xung t v i i u ki n sau)M t cc ti n trnh thay th



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UseUse--Cases TipsCases Tipsy Ph n l n b t u v k t thc b i tc

nhny K ch b n (m t ) c vi t theo cch

nhn c a tc nhn (v v y cc b cnn ch r cho tc nhn th y)

y S d ng cc cu khai bo



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T mT m kiki mm Use CaseUse Casey V i m i tc nhn, ta xc nh:

Nh ng d ch v no tc nhn yu c u t hth ng?H th ng c l u tr thng tin khng?x c, t o, h y, hi u ch nh, lu tr thng tinLi u tc nhn c n c thng bo v cc ski n trong h th ng, hay tc nhn c n thngbo cho h th ng v vi c g khng?Cng vi c th ng ngy c a tc nhn c ngi n khng?x K hng nn ch t p trung vo h th ng hi n t i



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Use Case ( cont.)Use Case ( cont.)y K hi u Use Case

L m t hnh elip ch a tn c a Use Casec t bn trong bin m hnh c a h th ng

K t n i v i t nh t mt tc nhn

Add Traffic Violation

Traffic Violations Report system

Clerk

Ngo i l cho cc UC c bi t v m r ng



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MM i quan hi quan h gigi a cc Use Casea cc Use Casey M i quan h Include (uses i v i cc phin

b n tr c)K hi m t s UC c chung hnh vi, th hnh vi s cm hnh ha thnh m t UC ring c s d ng b i cc

UC khcX > Y c ngh a l mu n th c hi n hnh ngX th ph i th c hi n Y t nh t mt l nTh n tr ng i v i vi c phn r ch c n ngUC include ph i hon ch nhX ph i th a mn nh ng i u ki n u c a Y tr c khiinclude Y

Use Case Mo deling 25

>X Y


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MM ii quanquan hh gigi aa cccc Use CaseUse Casey Quan h khi qut ha

S d ng khi m t s Use Case c chung m t vitc v , nh ng khc nhau m t vi tc v khc

c th tch ra thnh cc Use Case ring bi tCc Use Case t ng qut v chuyn bi t ph i ccng chung m c chM t Use Case chuyn bi t n m b t m t k ch b nno c a Use Case t ng qutUse Case t ng qut ph i hon thi n

Specialized Generalized



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MM ii quanquan hh gigi aa cccc Use CaseUse Casey Quan h khi qut ha

Use Case chuyn bi t c th t ng tcv i cc tc nhn m iLo i Use Case ny c ng c th thm vocc i u ki n u vpost-conditions

Specialized Generalized



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Recommended Wor k flowRecommended Wor k flow1. Xc nh cc tc nhn (quan h gi a chng n u c n

thi t)2. V i m i tc nhn xc nh, tm UC cho n khi

khng tm th y UC m ia. Xc nh t t c m c ch c a tc nhn

b. Quy t nh ti n trnh no s gip t c i v i m im c chc. T o Use Case i v i m i m c ch tm c

x Tc nhn/m c ch m i c th c tm th y trong b c nyd. Xc th c/ki m tra tnh ng cc Use Case tm c

3. V bi u Use Casen gi ha m hnh b ng cch l p l i cc quy trnh trong

tr ng h p bi u qu ph c t p



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TVRS Use CaseTVRS Use CaseExample



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Ex ampleEx ample TVRS Use CaseTVRS Use Casey Name: R emove TrafficViolationy Actors : Supervisor, OffendersDB.y Goal: R emove an existing TrafficViolationy R eferences to requirements: 1.2.3, 1.3.2.4, y Pre-conditions :

Normal Course of Lookup TrafficViolation UC iscompleted, and the details of an existing TrafficViolation are displayed

y Descriptio n:1. Supervisor calls for deletion of the chosen TrafficViolation

2. TVR S prompts Supervisor for confirmation

Ex ternalSystem



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Ex ampleEx ample TVRS Use CaseTVRS Use Case3. Supervisor confirms4. TVR S requests OffendersDB to delete the

TrafficViolation from the offenders record5. OffendersDB approves that the Traffic Violation

has been deleted6. TVR S allows Supervisor to look up a new

Traffic Violation as described in the LookupTrafficViolation UC

y Post-conditions :R emoved Traffic Violation is no longer stored inthe TVR S.Traffic Violation is removed from the offendersrecord in the OffendersDB"Lookup TrafficViolation" form is displayed



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Ex ampleEx ample TVRS Use CaseTVRS Use Casey Exceptions :

3a: Supervisor cancels:x 3a1: TVR S Continues to item 6 without removing the

TrafficViolation5a: Traffic Violation is not removed from theOffendersDBx 5a1: TVR S displays an error message describing the

failure5a2: TVR S continues to item 6 without clearing chosenTraffic Violation details, and without deleting the TrafficViolation



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Ex ampleEx ample TVRS Use CaseTVRS Use Casey Name: Add TrafficViolationy Actors : Clerk, PolicemenDB, OffendersDBy Goal: Add a new TrafficViolation to the TVR Sy R eferences to requirements: y Pre-conditions :The Traffic Violation Management window is

displayedy Description :

1. Clerk calls for addition of a new TrafficViolation2. TVR S displays an empty Traffic Violation Detailsform3. Clerk enters violation details and calls for saving

the new TrafficViolation



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Ex ampleEx ample TVRS Use CaseTVRS Use Case4. TVR S prompts Clerk for confirmation.5. Clerk confirms6. TVR S asks the PolicemenDB whether or not

the policeman is known7. PolicemenDB replies that the policeman is

known8. TVR S asks the OffendersDB whether or not

the offender is known9. [E xtension point] OffendersDB replies that the

offender is known



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Ex ampleEx ample TVRS Use CaseTVRS Use Casey Post-conditions :

New TrafficViolation is stored in the TVR STVR S displays an empty TrafficViolation Details form

y Variations :

5a: Clerk cancelsx 5a1: TVR S continues to item 2 without clearing the trafficviolation details entered by clerk

9a: OffendersDB replies that the offender is notknown.x Described in Use Case New Offender

7a: Policeman is not stored in the policemenDBx 7a1: TVR S displays an error messagex 7a2: TVR S continues to item 2 without clearing Traffic

Violation details entered by clerk...



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Ex ampleEx ample TVRS Use CaseTVRS Use Casey Exceptions :

3a: Clerk cancels addition of the new TrafficViolationx 3a1: TVR S displays the "Traffic Violation Management"

form



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Ex ampleEx ample TVRS Use CaseTVRS Use Casey Name: New Offender [extends Add Traffic

Violaton ]y Actors :y Goal:y References to requirements : y Pre-conditions :

Offender is not stored in the OffendersDB

U C attributes

are inherited



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Ex ampleEx ample TVRS Use CaseTVRS Use Casey Description :

9a: OffendersDB replies that the offender is not known.[Add TrafficViolation]9b: TVR S displays an empty Offender Details form9c: Clerk enters offender details and calls for saving the

new details9d: TVR S prompts Clerk for confirmation9e: Clerk confirms9f: TVR S requests OffendersDB to store the new offender 9g: OffendersDB replies that offender was storedsuccessfully

y Post-conditions :New Offender is stored in the offenders DB

y ...



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Ex ampleEx ample TVRS Use CaseTVRS Use Case

Remove T.V

Lookup T.V

ReplaceOffender

New Offender

E dit T.V.

(8)

Add T.V.(9)

Clerk

Supervisor

Traffic Violations Report System

>

>

> OffendersDB

PolicemenDB



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Levels of UseLevels of Use--CasesCasesy Sea-Level

Discrete interactions between primaryactor and system

y K ite-LevelShow how sea-level use-cases fit into

wider business interactions



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UseUse--CasesCasesy Provide the boundaries and scope of a

project



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P r ior it izeP r ior it ize Use CaseUse Casey Based on risky Timey Money



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Thank You!Thank You! feel t ire d? Y ES!!!!


UML Use Case Modeling Vn

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