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Homework

1. Module 2 2. Module 4 3. Module 74. Module 85. Module 96. Module 117. Module 128. Module 14

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1. Module 2 (1 of 2)

1. What is the best method for developing products: (a) product-based-development approach (PBDA), (b) object-oriented development, (c) clean room, (d) no one method of system engineering is better than all the others?

2. How many products are shown in “Example 3 -- house, good example”: (a) 0, (b) 1, (c) 6, (d) 7?

3. How many design activities are associated with the products in example “Example 3 -- house, good example” : (a) 0, (b) 1, (c) 6, (d) 7?

1. Module 2

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Module 2 (2 of 2)

4. The activity of getting land and lumber in “Example -- build a house” is which one of the following PBDA activities: (a) control, (b) design, (c) acquire products, (d) build?

5. A data interface document between subsystems is an example of (a) development product, (b) work product, (c) support product, (d) activity?

6. Which of the following has RAA for the product: (a) project manager, (b) system engineer, (c) all people on the project, (d) all have the same RAA?

1 . Module 2

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Module 4 (1 of 3)

1. RAA for requirements in the understand- wants activity lie with (a) requirements management, (b) the customer, (c) the contractor, (d) quality assurance

2. The understand-wants activity reaches agreement with the customer on which type of interfaces: (a) interfaces external to the product, (b) interfaces internal to the product, (c) all interfaces, (d) none

2 . Module 4

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Module 4 (2 of 3)

3. The customer (a) is always one entity, (b) may be more than one entity, (c) always the product at the next-higher level, (d) undefined

4. A good practice in reaching agreement with the customer is to have agreements made by (a) management, (b) contracts, (c) a single-point of contact for customer and a single-point of contact for contractor, (d) individual stakeholders

2 . Module 4

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Module 4 (3 of 3)

5. Trade studies should (a) always be done, (b) always use the method defined in the INCOSE Systems Engineering Handbook, (c) be done only if needed, (d) always include QFD considerations

6. For the requirement “Performance shall be met when speed 200 mph and 400 mph,” performance must be met at (a) requirement unclear, (b) 200 mph and 400 mph, (c) one point in the speed range, (d) all points in the speed range.

2 . Module 4

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Module 7 (1 of 2)

The customer wants to sell a line of lawn mowers that can cut Texas lawn grasses, requires partial assembly, and that costs less than $300

Develop a design that satisfies the customer• 1. List the customer requirements (>0, <10)• 2. List pseudo customer requirements (0,

<20)• 3. List the key items in the concept (>0, <20)• 4. List the key items in the design (>0, <20)

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Module 7 (2 of 2)

Develop a design that satisfies the customer (continued)• 5. List key items in documentation (>0,

<20)• 6. List the key items in the CDR (>0, <20)

Constraint of homework: List items shall be (>0, <30 words); no pictures

3 . Module 7

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Module 8 ( 1 of 13)

DiagramCustomer wantsTimepiece specTimepiece contractDesignClock specAC adapter specProblem

4 . Module 8

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Module 8 (2 of 13)

Customer wantsC1, C2, C3

Timepiece specS1

Timepiece contractX1

Timepiece designD1, D2, D3, D4, D5

Clock specT1

Adapter specU1, U2

Diagram

4 . Module 8

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Module 8 (3 of 13)

Customer wants• C1: I want a timepiece that I can look at

and determine time accurate to one minute per day since the last setting

• C2: Cost, size, weight, mechanism, style, power, and everything else are of no consequence

• C3: I will give a flat $100 for the timepiece regardless of design

4 . Module 8

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Module 8 (4 of 13)

Timepiece spec• Timepiece spec• S1: The timepiece shall display time

accurate to one minute per day since the last setting

4 . Module 8

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Module 8 (5 of 13)

Timepiece contract• X1: Customer will pay $100 for

timepiece meeting timepiece spec

4 . Module 8

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Module 8 (6 of 13)

Design (1 of 2)• D1: I’ll design the timepiece using

existing components.• D2: I want to make a lot of profit• D3: The Dilmore catalogue shows that its

least expensive clock is the model 100 for $4. It is resettable to correct the time, is accurate to one minute per day since the last setting, but requires an AC adapter

4 . Module 8

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Module 8 (7 of 13)

Design (2 of 2)• D4: The Hazel catalog shows the model 200

as its least expensive AC adapter compatible with the Dilmore model 100 clock, and the adapter costs $1.

• D5: The model 200 AC adapter comes in either black or beige at no extra cost. In my opinion, beige is more attractive in the customer’s environment

4 . Module 8

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Module 8 (8 of 13)

Clock spec• T1: Clock shall be a Dilmore model 100

clock

4 . Module 8

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Module 8 (9 of 13)

AC adapter spec• U1: AC adapter shall be a Hazel model

200 AC adapter• U2: AC adapter shall be beige

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Module 8 (10 of 13)

Problem (1 of 4)• 1. What items need to be successfully

implemented to verify item D5? -- a. T1, U1, & U2; b. U1 & U2; c. U1; d. U2

• 2. For tracing purposes, what items implement item X1? -- a. D3; b. D4, c. D3 & D4; d. D3, D4, & D5

4 . Module 8

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Module 8 (11 of 13)

Problem (2 of 4)• 3. For tracing purposes, where did the

requirements for item D4 come from? -- a. D3; b. D1, D2, & D3; c. D1, D2, D3, & X1; d. S1, D1, D2, & D3

• 4. For tracing purposes, what items implement item C2? -- a. none of the listed items, b. S1 & X1, c. D1, D2, & D3; d. T1, U1, & U2

4 . Module 8

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Module 8 (12 of 13)

Problem (3 of 4)• 5. What items need to be successfully

implemented to verify item S1? -- a. C1; b. D3; c. D2 & D3; d. D3, D4, & D5

• 6. For tracing purposes, where does item D1 come from? -- a. none of the listed items; b. S1; c. X1; d. S1 & X1

4 . Module 8

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Module 8 (13 of 13)

Problem (4 of 4)• 7. For tracing purposes, where does

item U2 come from? -- a. none of the listed items; b. D5; c. D4; d. S1

• 8. If item D3 were to change to no longer require an AC adapter, which items would change? -- a. no items would change; b. D4; c. D4 & U1; d. D4, D5, U1, & U2

4 . Module 8

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Module 9 (1 of 11)

ProblemSix statesDetermined byOff stateNot communicating stateNot loaded stateLoading stateLoaded stateOperating state

5. Module 9

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Module 9 (2 of 11)

Problem • 1. Create the decision table for this

problem • 2. Show the number of decisions for

each column• 3. Create the path matrix showing the

number of paths between each state and the number of decisions for taking each path

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Module 9 (3 of 11)

• Hint -- Use Excel to generate the decision table in canonical format using the criteria in the order given, and don’t be intimidated by the words defining the resulting state

• Compare the sum of the decisions for each column with the product of the criteria

5. Module 9

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Module 9 (4 of 11)

Six States• 1. Off• 2. Not communicating• 3. Not loaded• 4. Loading• 5. Loaded• 6. Operating

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Module 9 (5 of 11)

Determined by • Power command = on (false, true -- [F,T])• Communication status = OK (false, true -- [F,T])• Load status (failed, none, complete -- [F, N, C])• Load command (none, stop, load -- [N, S, L])• State [1, 2, 3, 4, 5, 6]• Operate command (stop, operate [S, O])

5. Module 9

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Module 9 (6 of 11)

Off State• If the power command is off, then the

state is off

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Module 9 (7 of 11)

Not Communicating State• If (1) the power command is on and (2)

the communication status is false, then the state is not communicating

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Module 9 (8 of 11)

Not Loaded State• If (1) the power command is on and (2) the

communication status is true and (3) either • (a) the load status is failed or • (b) the load status is none and the load command

is none and the state is 1-3, or• (c) the load status is complete and the load

command is none and the state is 1-3, or• (d) the load status is none or complete and the

load command is stop • then the state is not loaded

5. Module 9

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Module 9 (9 of 11)

Loading State• If (1) the power command is on and (2) the

communication status is true and (3) either• (a) the load status is none and the load

command is none, and the state is loading or• (b) the load status is none and the load

command is load or• (c) the load status is complete and the load

command is load• then the state is loading

5. Module 9

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Module 9 (10 of 1)

Loaded State• If (1) the power command is on and (2) the

communication status is true and (3) either• (a) the load status is either none or complete,

and the load command is none, and the current state is either loaded or operating, and the operate command is stop

• (b) the load status is complete, and the load command is none, and the current state is loading

• then the state shall be loaded

5. Module 9

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Module 9 (11 of 11)

Operate State• If (1) the power command is on, and (2)

the communication status is true and (3) the load status is none or complete, and (4) the load command is none, and (5) the current state is loaded or operating, and (6) the operate command is operate then the state shall be operating

5. Module 9

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Module 11 homework (1 of 3)

ProblemAssumptions

6. Module 11

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Module 11 (2 of 3)

Problem• 1. List the products that need to be

acquired to build a basketball half-court in someone's backyard within a city

• 2. List the products that are not part of the final product

• 3. Define the build steps resulting in a finished product

• 4. List where verification -- if any -- is included in the process

• 5. State how we know when we’re done6. Module 11

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Module 11 (3 of 3)

Assumptions• The turn-key job cannot be

subcontracted • Subcontracting allowed otherwise

6. Module 11

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Module 12

1. For buying a car for personal use, list three types of tests that might apply for each of the four test methods.

2. If we said that we were going to verify the weight of a car by adding up the weights from the spec sheets for each component of the car, what test method would we use?

3. In building a house, what is an example of a verification test that we might require before the house is complete?

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Module 14

1. Determine BCWPcum, BCWScum, ACWPcum, CVcum, EACcum, CPIcum, SVcum, and SPIcum at the end of each day for the following problem.• Planned duration of task -- 4 days• Actual duration is five days• Planned spending rate per day -- $1000• Actual spending rate per day -- $700, $800,

$1000, $1250, $1000• Amount of total job completed per day --

$600, $800, $800, $1000, $800

8. Module 14