Question

Run Chart Exercise

The assignment will help you to meet course learning outcome # 4

Understand the concepts of operations planning and control, including forecasting,

capacity assessment, scheduling, inventory, and material requirements

Specifically it requires you to analyze data using a run chart.

Excellence System Objectives

The assignment helps develop your information and technology proficiency and your analysis and problem solving skills

Assignment Guidelines

The table below details the number of defects found in 30 samples of 100 electronic assemblies taken on a daily basis over on month. Plot these data on a correctly labelled run chart, computing the average value (center line).

1	6	5	5	4	3	2	2	4	6
2	1	3	1	4	5	4	1	6	15
12	6	3	4	3	3	2	5	7	4

When your chart is complete,create a Word document and complete the following:

1. Explain the purpose of a run chart, identifying what it can and can’t it tell you.

2. Import your chart into the Word Document

3. Interpret the chart and state what you would do as the operations manager on the basis of the results

4. Provide at least two additional scenarios in which you might use a run chart.

Mechanics

• Include your name, date, course number and title of the assignment left justified at the top of your paper.

• Check for grammar and spelling errors prior to submission

• Cite and reference in APA format where applicable.

Run Chart Grading Rubric

Grading Criteria	Exemplary 90-100%	Proficient 70-89%	Needs Development <70%
Purpose   20 points	Thoroughly and correctly explained and supported	Thoroughly explained but missing support	Explanation is not wholly accurate or sufficiently well explained and is missing.
Chart 20 points	Chart is correct, properly labelled, successfully imported and formatted	Chart is correct but labelling and formatting needs improvement	Chart is incorrect, labelling may be missing and formatting needs improvement
Interpretation 20 points	Interpretation is thorough and accurate. Managerial action is appropriate	Interpretation is accurate. Managerial action is appropriate.	Interpretation is inaccurate causing inappropriate managerial action
Scenarios 20 points	Two appropriate scenarios are provided	Two scenarios are provided but one is not appropriate.	Scenarios are missing or not appropriate
Mechanics 20 points	Wholly correct	Occasional minor error	Numerous errors

Answer 1

Here, I will be forming the Control chart for the defects, I will form C Chart for the given data as Number of defects shown for 30 samples with sample size is constant or 100 electronic assemblies, here using Software – Minitab, we can prepare the Control chart - C Chart for defects, and we will be able to get the upper control limit, lower control limit and Control line – Average value

Data:

Sample Size	Number of Defects
100	1
100	6
100	5
100	5
100	4
100	3
100	2
100	2
100	4
100	6
100	2
100	1
100	3
100	1
100	4
100	5
100	4
100	1
100	6
100	15
100	12
100	6
100	3
100	4
100	3
100	3
100	2
100	5
100	7
100	4

Software used: Minitab, steps – Go to stat> Control Charts> Attribute Charts> C Charts, then select data column of Number of defects, under control chart option, Tick Perform all test for special causes, then click OK,

Below is the control chart for above Data

Interpretation:

TEST 1. One point more than 3.00 standard deviations from center line.

Test Failed at points: 20, 21, so we should find the associated root cause for the sample 20 and sample 21 failures,

Here, Run chart should not be used, as Run chart to be used in the condition, where, we need to project or show the data over time, for example, we want to plot the data of Sales demand of Fashion clothes over Time, or we want to plot Improvement of Productivity at the manufacturing sites over time, inn such situation, Run Chart can be used

Further, Run chart can show Pattern of the data, Trends of the data and Shifts of the Data pattern as applicable

Reference: “Run Chart and control Chart basics” Retrieved from Website blog(dot)minitab(dot)com