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FS 303 > Quality Assurance + Process control > Flashcards

Quality Assurance + Process control Flashcards

1
Q

Define “quality”

A

Conformance to requirements and specifications (overall characteristics of food that determine its value and acceptability to consumers)

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2
Q

Name some standards (ie colour)

A

-Purity
-Strength
-Flavour
- Size

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3
Q

What are the four standards of quality?

A

1- Legal
2 - Industry
3 - Company
4 - Consumer

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4
Q

Define Legal standards

A
  • Made by federal, state or municipal agencies
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5
Q

What do legal standards aim to achieve?

A

1 - Freedom from adulteration
2 - Safety (antibiotics, moulds, pesticides, addatives)

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6
Q

Define industry standards.

A

An organized group established limits of quality (standard of identity)+ ensure consistency

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7
Q

What are some things that are examples of industrial standards.

A
  • standards in order to** identify** (ie. ice cream contains not less that 10% milkfat etc) -> product definitions
    -standards of food safety
    -Nutritional standards
    -Packaging andlabeling standards
    -labour standards
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8
Q

What are the three tools for quality assurance:

A

Statistics, sampling, control charts

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9
Q

What are the two forms of process control using data?

A
  1. Supervisory Control And Data Acquisition (SCADA)
  2. Statistical Process Control (SPC)
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10
Q

What is SCADA used for?

A

Automation systems - collects data from sensor etc. and analysis + control

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11
Q

What is SPC?

A
  • A** quality control technique** where a process variable or quality attribute is** measured and tracked over time.**
  • Management technique for monitoring and controlling a process.
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12
Q

What data is collected during SCADA and SPC?

A

Some property of the system or product is measured (ie. temp, pressure, speed, pH etc)

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13
Q

What is the purpose of using SCADA and SPC?

A

to determine if the process needs adjusting to maximize quality and minimize defects.

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14
Q

What is a set point in SCADA (SP)

A

Desired value for the process

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15
Q

What is the Process Variable (PV) in SCADA?

A

**Actual measured value **from the process

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16
Q

What is an error defined as?

A

The difference between the Process Variable and Set Point (PV-SP)

17
Q

What is the control output (CO)?

A

a Mathematical function of the process error used to control the equipment.

18
Q

What is Human Machine Interface (HMI)?

A

Connection to the operator (display, touchpad, keyboard, buttons, indicator lights, gauges etc)

19
Q

What is used to preform SPC?

A
  • SCADA system process variables (flow rate, tempt, pH etc)
  • From quality assurance ;ab measurements of product samples taken off the line.
20
Q

How does SPC see if the process is in control?

A

Analyze measured data from QA lab and SCADA

21
Q

What determines whether the process is in control during SPC?

A

1 -** Location**: determining whether the system is delivering the product within specifications (is the value between limits?)

2 - Variation: determine whether the manufacturing process is stable and consistent

22
Q

What are the two types of process variation?

A

1 - Common Cause Variation
2 - Special Cause Variation

23
Q

What is Common Cause Variation?

A

Natural background variation (normally a bell curve)

  • due to the effect of cumulative small, random and uncontrollable factors.
  • part of any stable process.
24
Q

What is Special Cause Variation?

A

Variation that is not present in the system at all times (patterns, drifting, cycles and increased variation, outliers)

25
Q

Define Type I error

A

Ascribed variation to a special cause when it really was a common cause

26
Q

Define Type II error

A

Ascribed variation to a common cause when it really was a special cause.

27
Q

What reduces the probability of a Type I error?

A

A 3 derivative confidence limit

28
Q

What are the purposes of a control chart?

A

1 - Get a picture of the process over time
2 - Understand + predict process capabilities
3 - Easily identify process shifts

29
Q

What is the purpose of the centre line in a control chart?

A

It is considered the target value of the process.

30
Q

What is the grand Average in SPC?

A

The average of the subgroup averages

31
Q

What is the average standard deviation for SPC

A

The average of the subgroup standard deviations

32
Q

What are company standards?

A

Voluntary standards

33
Q

What are consumer standards?

A

Consumer requirements

FS 303 (12 decks)

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