1

Customer wants Want to be able to get on the web from office at home with an easily viewable display for less than $2000 to do routine transactions, view attachments, and exchange e-mail

2

Customer requirements

C_internet: Interact with the internet C_display: Display 15 inch, color C_west_wall: West wall of home office C_cost: Cost $3000 C_monthly_fee: Monthly fee $50 C_surf: Capable of surfing web C_e-mail: Capable of sending and

receiving e-mail containing attachments

C_attachments: Capable of sending, receiving, and viewing Word,

PowerPoint, and Excel attachments

3

Pseudo requirements

P_profit: Make 20 percent profit P_lower cost: Generate customer satisfaction

and gather new business by doing job for 10 percent less than what customer planned

P_maintain: Generate customer satisfaction and gather new business by installing an internet station that can be maintained

4

Concept

computerfurniture

officephone internet service

software

5

Internet-source study

phone line ISDNmeets requirements yes yescost per month $20 $40

conclusion choice

6

Internet-station-cost study

subsystem cost 20% profit total monthly

material $50 $10 $60tools $100 $20 $120furniture $500 $100 $600computer $1,000 $200 $1,200windows 98 $100 $20 $120office 2000 $350 $70 $420phone internet service $20 $4 $24 $20installation $20 $4 $24one-year warranty $20 $4 $24total $2,160 $432 $2,592 $20requirements satisfaction <$2700 <$45

7

Jack study -- present

storage kitchen

office bedroom

8

Jack-installation study -- low cost option

storage kitchen

office bedroom

• Low cost but not maintainable by phone company

attic connection

9

Jack- installation study -- by-the-book option

storage kitchen

office bedroom

• Higher cost and risk because of running wire through outside wall with insulation, but maintainable by phone company

10

Jack-installation study -- low-risk option

storage kitchen

office bedroom

• Medium cost but low risk and maintainable by phone company

11

Partitioning study -- approach 1

Internet station

jack furniture computer software internet

12

Partitioning study -- approach 2

Internet station

material

furniture computer internet

tools

software

13

Internet-station design

jackper jack

design

furniture per

furniture spec

computerper

computer spec

software per

software spec

internet per

internet spec

installs in

installs in

house-compatible phone linephone line

120 VAC

west wall

house-compatible

120 VAC

warranty $20, installation $20

14

Jack-installation design

storage kitchen

office bedroom

Two three-wire standard house phone jack mount in UL approved socket on east and west walls 8 feet from inside surface of south wall at height from floor equal that of other power sockets in office

Added wire

15

Bill of materials Furniture per furniture spec Computer per computer spec Software per software spec Internet per internet spec Jack materials per jack materials spec Jack tools per jack tools spec

16

Furniture requirements

F_cost: Cost $500 F_desk: Computer desk– Brown walnut finish– Contemporary office style– Capable of accommodating 21 inch monitor,

tower, laser printer, scanner, back up drive– Shelf space of total length >4 feet x 1 foot– File drawer and pencil drawer

F_chair: Chair– Matches table in style and color– Has wheels– Padded seat, back rest, arms

17

Computer requirements X_cost: Cost $ 1000 X_display: Display 15 inches, color X_software: Runs Windows 98 and Office 2000 X_PC PC computer X-modem: 56K modem X_jack: Compatible with house phone line X_power US 120 VAC

18

Software requirements S_cost: $450 S_W98: Windows 98 S_2000: Office 2000 S_PC:PC compatible

19

Internet requirements I_cost: Post $20 per month I_internet: Provides access to internet I_surf: Allows net surfing I_e-mail: Provides at least one e-mail account I_attachments: Allows attachments with e-mail

20

Jack material requirements M_cost: Cost $50 M_wire: 50 feet, six-conductor phone wire M_sockets: 2 UL-approved wall sockets M_jacks: 2 house-compatible phone jacks M_foam: insulating foam

21

Jack tool requirements T_cost: Cost $100 T_tool_list: Drill

Diagonal cutters

1/2 inch wood bit

Screw driver

Utility knife

Tape measure

22

Design documentation Internet-station design Internet-station bill of materials Jack design Furniture requirements Computer requirements Software requirements Internet requirements Jack-material requirements Jack-tool requirements Internet-source study Internet-station-cost study Jack installation study Partitioning study

23

Tracing for validation

Requirement Validating element

C_internet I_internet, X_modemC_display X_displayC_west_wall design C_cost cost study, F_cost, X_cost, M_cost, T_cost, designC_monthly_fee I_monthly feeC_surf S_2000, I_surfC_e-mail S_2000, I_e-mailC_attachments S_2000, I_attachments

P-profit cost study, F_cost, X_cost, M_cost, T_cost, designP_lower_cost internet-source study, I_costP_maintain design

24

Acquiring computer MMX >200 MHz 15 inch SVGA color display Tower with 100 watt power supply 64 MB SDRAM 128K cache 8.4 GB IDE hard drive 56 K modem 40X IDE CD-ROM PS/2 keyboard PS/2 mouse

25

Acquiring jack Put a jack compatible with house on west wall

Acquiring jack assuming jack subsystem, is acquired as turn key job

26

Jack build steps

Acquire materials Acquire tools Cut new wire between two office jacks (wire, tape, cutters) Drill holes in attic for wire (drill, bit) Cut phone wire between office and bedroom (tape, cutter) Feed two wires down through each hole Insulate holes (foam) Cut socket holes at desired locations (knife, tape) Install sockets (sockets) Install jack nearest kitchen and test (jack and screw driver) Install second jack and test (jack and screw driver)

27

Problem tracking system

Could not locate where to drill hole Need light to see work area in attic Need extension cord for drill and light

28

Delivered and undelivered products Delivered– Furniture– Computer– Software– Material– Internet

Undelivered– Tools

29

Success

Option 1 -- Meets customer requirements, pseudo customer requirements, and design

Option 2 -- It works and there’s a warranty to back it up