4) The company determines that the population standard deviation of the hole dia
ID: 364389 • Letter: 4
Question
4)
The company determines that the population standard deviation of the hole diameter is 0.16mm and they have decided to use limits of 2.5-sigma for means and 3-sigma for ranges moving forward.
Determine whether or not the process is in control with respect to means and ranges (note that you still use the factors for ranges).
On the same worksheet, create a control chart for means and a separate control chart for ranges that shows the upper and lower control limits along with the relevant data. Be sure to title each chart so that we can tell which is which.
Mean and Range:
Item 1 2 3 4 5 6 Sample 1 12.30 12.09 12.30 11.91 12.07 11.79 2 11.85 12.27 12.03 12.08 12.06 12.30 3 12.27 11.92 12.12 12.19 12.32 12.29 4 12.24 12.31 12.13 12.19 12.17 12.32 5 12.08 11.93 12.30 11.98 11.85 12.15 6 12.15 12.00 11.98 11.91 11.93 12.15 7 11.99 12.21 11.84 12.19 11.90 11.76 8 12.35 11.99 12.19 11.99 11.88 11.96 9 12.31 12.03 12.13 11.80 12.08 12.07 10 11.75 12.12 12.23 11.78 11.78 11.89 11 12.05 11.91 11.94 12.32 11.97 12.07 12 11.96 11.92 12.30 11.77 11.88 12.09 13 12.31 12.16 12.31 12.16 12.13 11.90 14 12.10 11.98 12.32 11.86 12.24 12.35 15 12.29 11.83 12.08 12.25 12.17 12.18 16 12.12 12.07 11.89 12.24 12.01 11.89 17 12.00 11.96 12.01 12.32 11.98 12.29 18 11.97 12.19 12.32 12.17 11.82 12.30 19 11.76 11.91 11.87 12.27 12.20 12.23 20 11.90 12.14 12.34 12.00 12.10 12.22 21 12.12 12.25 11.78 11.75 11.95 11.97 22 11.89 11.98 12.10 12.32 12.06 12.10 23 11.97 11.82 12.17 12.14 12.12 12.22 24 11.98 12.20 12.28 12.27 11.96 12.17 25 12.22 11.82 12.18 12.15 12.05 12.09 26 12.08 11.83 12.02 12.35 12.10 12.14 27 11.76 12.29 12.20 11.96 12.13 12.13 28 12.22 11.81 12.17 12.32 12.13 12.24 29 11.75 12.26 12.30 12.08 12.16 12.13 30 12.11 12.19 12.32 12.20 11.90 12.19 31 12.20 11.81 12.26 12.27 11.84 11.94 32 11.79 11.99 11.76 12.19 12.21 12.31 33 12.01 12.08 12.28 12.23 12.30 12.06 34 12.08 11.98 11.91 12.33 11.96 12.33 35 12.32 12.34 11.83 12.35 12.12 11.94 36 12.06 12.25 11.77 11.81 12.27 12.33 37 12.00 11.82 12.12 11.75 11.86 11.79 38 11.77 12.17 12.27 12.23 12.17 11.85 39 11.78 12.34 12.16 12.16 12.30 12.33 40 11.76 11.75 11.79 12.26 12.15 12.08Explanation / Answer
Information Systems Analysis and Design-Development Life Cycle == Businesses and organizations use various types of information systems to support the many processes needed to carry out their business functions. Each of these information systems has a particular purpose or focus, and each has a life of its own. This “life of its own” concept is called the systems development life cycle or SDLC, and it includes the entire process of planning, building, deploying, using, updating, and maintaining an information system. The development of a new information system involves several different, but related activities. These activities, or phases, usually include planning, analysis, design, implementation, and maintenance/support. In other words, SDLC is a conceptual model that guides project management in information system development.
According to author Harold Kerzner, Ph.D. there are sixteen points that will lead to project management maturity:
Adopt a project management method and use it consistently.
Implement a philosophy that drives the organization toward project management maturity and communicate it to everyone.
Commit to developing effective plans at the beginning of each project.
Minimize scope changes by committing to realistic objectives.
Recognize that cost and schedule management are inseparable.
Select the right person as a project manager.
Provide executives with project sponsor information and not project management information.
Strengthen involvement and support of all appropriate management.
Focus on deliverables rather than resources.
Cultivate effective communication, cooperation, and trust.
Share recognition for project success.
Eliminate nonproductive meetings.
Focus on identifying and solving problems early, quickly, and cost effectively.
Measure progress periodically.
Use project management software as a tool; Not as a substitute for effective planning or interpersonal skills.
Establish an all-employee training program with periodic updates based upon documented lessons learned.
The design phase is concerned with the physical construction of the system. Included are the design or configuration of the network (hardware, operating system, programming, etc.), design of user interfaces (forms, reports, etc.), design of system interfaces (for communication with other systems), and security issues. It is important that the proposed design be tested for performance, and to ensure that it meets the requirements outlined during the analysis phase. In other words, the main objective of this phase is to transform the previously defined requirements into a complete and detailed set of specifications which will be used during the next phase. Some of the activities that need to take place during the design phase are
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