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                          Assignment No. 04
                        Semester: Spring 2017

CS605: Software Engineering II

Total Marks: 10

 

Due Date: 27th July 2017

 

Instructions:

Please read the following instructions carefully before submitting assignment:

You need to use MS word document to prepare and submit the assignment on VU-LMS.

It should be clear that your assignment will not get any credit if:

 

  • The assignment is submitted after due date.
  • The assignment is not in the required format (.doc or docx)
  • The submitted assignment does not open or file is corrupt.
  • Assignment is copied(partial or full) from any source (websites, forums, students, etc)

 

 

 

Objective:

 

The objective of this assignment is to learn about:

 

  • Software reliability
  • Statistical Software Quality Assurance

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Assignment 

 

 

 

Question No. 1

 

“Mira Soft” software house is currently working on a project of bank transaction system, while evaluating the software reliability of this project it was found that availability was 92% and MTTF (Mean Time to Failure) is 48. You are required to calculate the Mean time between failure (MTBF) of this project and provide your answer in the following table:

 

Calculation

Result

 

 

 

 

Question No. 2

 

“Alpha Soft” software house is working on a project of school management system, for this project information about defects is collected for first step and categorized as Incomplete or erroneous specifications (IES), The following data is collected for this category:

 

Step

Error Category

Serious

Moderate

Minor

1

IES

35

70

105

 

ws, wm, wt  are weighting factors for serious, moderate, and minor errors.

Recommended values for these are 10, 3, 1 respectively.

 

You are required to calculate Phase Index for this step.

 

 

 

 

 

 

 

 

 

Best of Luck!

 

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first question mae MTTR kaya hai 2nd question to ho gaya

MTTR (Mean Time To Repair)

i said MTTR not MTBF

handouts mae MTBF ka formula hai

MTBF=MTTF+MTTR

MTTF to question mae diya hova hai but what is MTTR

Es main Availability wala formula use ho ga.

Availability = (MTTF/MTBF) x 100

and ye jo 92% hai is ka kaya karna hai question 1 mae kahi yahi to nhe MTTR

Si=35

Mi=70

Ti=105

Ei kia hai????????

Ei is the total number of errors uncovered during the ith step in the SE process

Ei=Si+Mi+Ti

Ei=35+70+105

Ei=210

thankuuuuu

1st mein

Availability=(MTTF/MTBF)*100???

just values put krni hain?

yes

MTBF ki value calculate krni hy

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