Check-sheets

The check sheet shown below, which is tool number five, is a simple technique for recording data (47). A check sheet can present the data as a histogram when results are tabulated as a frequency distribution, or a mn chart when the data are plotted vs time. The advantage of this approach to data collection is the abiUty to rapidly accumulate and analy2e data for trends. A check sheet for causes of off-standard polymer production might be as follows ... 

Q7 PROCESS CHART. PARETO ANALYSIS, CAUSE AND EFFECT DIAGRAM, HISTOGRAM, CORRELATION DIAGRAMS, PROCESS CONTROL CHARTS, CHECK SHEETS... 

Check-sheets - used to tabulate results through routine checks of a situation The further seven quality tools for use when not all data is available are ... 

Figure 7-14, Operational Check Sheet [25], lists 16 possible causes of overpressure in a process system. There are many others, and each system should be reviewed for its peculiarities. System evaluation is the heart of a realisdc, safe and yet economJcal overpressure protection installation on any single equipment or any group of equipment. Solving formulas with the wrong basis and/or data can be disastrous. The following should be reviewed ...

SAFETY VALVE DESIGN OPERATIONAL CHECK SHEET... 

Figure 7- l4. Safety valve design operational check sheet. Adapted and added to by permission, N. E. Syivander and D. L. Kiatz, Design and Construction of Pressure Relieving Systems, Univ. of Michigan Press, Ann Arbor (1948). Six items of overpressure list above by this author and from API Rec. Practice 521 (1982). 

Checker burner, 23 660 Checklists, safety, 13 155 Check sheet, 21 177 Check valves, 19 475 76... 

QC tools will be used, such as check sheets, histograms, Pareto diagrams, and cause-and-effect diagrams. Scatter diagrams and control charts will be provided, where appropriate, for in-process attributes and finished-product data as an attachment. 

Appendix 23D Sample Instrament Loop Check Sheet.577... 

The loop test results should be recorded (a sample instrument loop check sheet has been provided for reference purposes in Appendix 23D) and included with the site test records. Checks for mechanical/electrical completeness are recorded using the upper section of the sheet and the dytramic loop test results are recorded on the lower section. The test results sheets will provide the documentary evidence essential for Installation Qualification (IQ). Representatives from the installation contractor and/or the customer will witness the final loop tests and countersign the test sheets. Any tests not witnessed must be accompanied by written confirmation from the customer that witnessing has been waived. 

A specimen check sheet of this sort is shown in Figure 1. In this instance the references in a volume of Chemical Abstracts are listed in approximately numerical order. Such a sheet can usually be easily expanded to contain all the references noted in a cumulative index, such as the Chemical Abstracts Decennial Index. 

The TV branch of Delhi also tried to evaluate the lessons. They used to send a printed pad of evaluation check sheets to each school for the constant feedback of TV lessons. If various people connected with educational TV production do their jobs consciously the E.T.V. programmes can be quite effective. You as a science teacher has to play an important role. During your practice teaching you can observe some science lessons on video tapes, evaluate them according to the evaluation check sheet developed by you and give suggestions for further improvement. 

The other six are the check sheet, the flowchart, the histogram, the Pareto chart, the cause and effect (or fishbone) diagram and stratification. 

Planning It is important to have a clear understanding of what we want to learn from the data and who will collect and analyze it. The process of plemning the form may force a more thorough consideration of the issues. Two types of forms ace the check sheet rmd the recording form. Other tools A form for collecting data is often built into other data analysis tools such as a control chart. All of the other data analysis tools will require some sort of data collection form for capturing observations or measurements. 

Histogram 2.2. Check Sheet 1857 1858 4.2. Other Charts 4.3. Process Capabihty Analysis 1868 1869... 

The check sheet is a simple and useful tool that is often used in the early stages of a quality control program. It provides a uniform and consistent means for data collection and analysis. Like many of the traditional tools, the check sheet is defect oriented and is used to classify the types of defects frequently found for a product or service. It is used to spot problems areas by identifying defect types that frequently occur. As a result, a check sheet is often used as the input to the next tool, called the Pareto chart. The check sheet is most often tabular in format as presented in Example 2. 

Example 2. For the same toy of Example 1, defect data have been collected on a weekly basis to attempt to classify the underlying sources of product defects. In particular, several defect types have been established, and the operators are given a matrix simply to track the number of defects of each category for a multiday study period. The resulting check sheet is presented as follows ... 

Toy 1 Check Sheet Defect Count—Finished Surface... 

As demonstrated above, the percent breeikdown and accumulation of percentages are readily determined for each defect type. If the percent vedues are ranked from largest to smallest, a Pareto cheut (discussed in the next section) is effectively computed, which makes the Pareto chart an obvious companion to the check sheet. 

In the context of the check sheet, the resulting Pareto chart is simply the relative frequency of the defect types as observed during a study period. Pareto charts are effectively the plot of the relative frequency or cumulative frequency, of defect types. 

Now let s convert this data to a check sheet-type format and see what we can learn. 

So if current ideas of safety on site are not really working, what can be done Well, as the introduction to this chapter suggested -the ideas and understandings of safety unpacked above are indeed helpful. They are able to illustrate what safety is on site -and that it is all a bit of a mess is itself well worth knowing. However, it would perhaps be more helpful to be able to understand these ideas in a more coherent way - and whenever the complexities of both people and the social worlds are explored, very often the concept of culture comes to the fore. This is what Choudhry et a/. (2007 1003) were alluding to in the quote found at the start of this chapter. Where complexity and dissonance start to emerge around safety, the check-sheets and tick boxes of proceduralised safety management systems become less relevant... 

Two of the seven tools of quality discussed above are not illustrated. These are the scatter diagram and the check sheet. The scatter diagram is a graphic technique to analyze the relationship between two variations and the check sheet is a simple data-recording device. The check sheet is custom designed by the user, which facilitates interpretation of the results. Most Biomedical Equipment Technicians use the check sheet on a daily basis when performing preventive maintenance, calibration, or electrical safety checks. 

Doing a Pareto chart, based on either check sheets or other forms of data collection, helps us direct our attention and efforts to truly important problems. We will generally gain more by working on the tallest bar than tackling the smaller bars. The Pareto chart is one of the seven tools of quality. 

Deming principles, or other soundly based quality management concepts, cannot be applied without the use of statistical control methods cause-and-effect diagrams, control charts, run (trend) charts, Pareto charts, flow charts, check sheets, histograms. Juran and Gryna are very good on this subject. So also are Cyrus Derman and Sheldon M. Ross in Statistical Aspects of Quality Control. 

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