Measurement Plan

Displays an identifier for a set of characteristics and instructions.

Characteristic

Displays a specific characteristic name or identifier.

Measurement Plans - Characteristics

QS_MFDS_PLAN

Quality, Establish Control Plans, Measurement Plans, Characteristics

Create and edit measurement plan characteristics. Define a group of characteristics for analyzing quality data. Specify the unit of measure, specification, acceptance limits, and the control procedures and charts for monitoring the characteristics. Define formulas to calculate sample values for characteristics that cannot be measured directly.

Formula Definition

QS_MFDS_CALC_PNL

Click the Enter Formula button on the Formula tab of the Measurement Plans - Characteristics page.

Create or edit characteristic formulas.

Measurement Plans - Instructions

QS_MFDS_PLAN_TXT

Quality, Establish Control Plans, Measurement Plans, Instructions

Add operator instructions.

Class Type Code (classification type code)

Select the classification code that you want to use for inspection requirements.

See Maintaining Characteristic Class Types.

Data Type

Select the data type for this characteristic. Values are:

Variables: Quantitative or physically measurable (or derived) properties, such as size, mass, or time.

Defects: Qualitative or observed data on defect types—such as scratches and blemishes—and associated counts.

Defectives: Counts the number of units that are defective using a pass-or-fail criteria.

Subgroup Size

Enter the size of the sample taken during each inspection cycle. A 0 indicates that the subgroup size may vary, and the size is entered at the time of inspection. Size ranges are:

• Variables: 1 – 20

• Defects: 0 – 20

• Defectives: 0 – 500,000

Incomplete Subgroup

Select to determine how the system responds when insufficient data exists to satisfy the subgroup size that is defined. This field is applicable to the variables data types only.

Average: The system completes incomplete subgroups using the average of the sample values that have been collected.

Do Not Accept: The system analyzes the subgroup only after the subgroup size is reached.

Active

Select to enable data collection for the characteristic.

Return Results

Select to have the system return subgroup results to integrated applications. This option also enables applications that call Quality data to capture information from the Quality session and use it for additional processing. In practice, the most significant results are usually pass-or-fail counts.

Quality returns results for a single defectives type characteristic. Indicate the characteristic for which the system returns results.

Control Chart

Select the control chart that the system uses to monitor process variability. The standard system-supplied charts include:

c Chart

np Chart

p Chart

u Chart

X and Moving Range

Xbar and Range

Xbar and Sigma

Any custom charts that you define are also available for selection. Control chart selections depend on the characteristic data type.

Graphic Preferences

Select the default analysis content and graphic presentation for a characteristic during data entry or review. Graph preferences are configured using the Graph and Display Preferences component.

Control Procedure

Select the control procedure that the system uses to assess process control.

LSL (lower specification limit) and USL (upper specification limit)

Enter the limits for product or dimensional adherence. They are typically manufacturing and assembly tolerances or customer-specified targets. Leave either field blank to accommodate unilateral specifications.

LAL (lower acceptance level) and UAL (upper acceptance level)

Enter the absolute minimum and maximum values accepted during manual data entry operations. This reduces the entry of spurious data. You can leave either or both fields blank.

Factor 1 and Factor 2

Enter constant values that are imported into optional, derived characteristic formulas.

Formula

Specify a formula that the system uses to derive sample values for the characteristic. Enter the formula or click the Formula Definition button to access the Formula Definition page.

Note. During data entry, the system calculates sample values of characteristics with defined formulas. These cannot be edited.

Multiply two characteristics.

(VAL[Length]*VAL[Width])

Calculate the deviation from the nominal of the specification.

(MEAN[Length]–NOMS[Length])

Note. Requires bilateral specifications.

Round the value of length to hundredths.

(NINT(VAL[Length]*100)/100)

Calculate Cpk for the current subgroup of length.

(MINS((USL[Length]–MEAN[Length] /(3*STDEV[Length])) ((MEAN[Length]–LSL[Length]) / (3*STDEV[Length])))

Note. Recommended usage should include the length characteristic with n>7 (at least 3) and an Xbar and sigma chart.

Cpk characteristic should be n=1 with an X and Moving Range chart.

ABS( )

Absolute value of the quantity specified in parentheses.

ABS(VAL[Length])

Note. Computes absolute value of the reading entered for length.

EXP( )

Exponential function. Returns e raised to the power of the specified value.

EXP(2)

FACT1

Factor 1 from the Specifications page.

FACT[1]

FACT2

Factor 2 from the Specifications page.

FACT[2]

INT( )

Integer portion.

INT(VAL[Length])

Note. Computes integer portion of the reading entered for length.

LOG( )

Natural log function.

LOG(Length)

LOG10( )

Log based 10 function.

LOG10(Length)

LSL

Lower specification limit of the current characteristic.

LSL

MAXS (maximum)

Maximum value in subgroup of readings entered for a characteristic.

MAXIMUM[Length]

Note. Computes maximum value in the subgroup of readings entered for length.

MEAN

Mean of subgroup of readings entered for a characteristic.

MEAN[Length]

Note. Computes mean of the subgroup of readings entered for length.

MINS (minimum)

Minimum value in subgroup of readings entered for a characteristic.

MINIMUM[Length]

Note. Computes minimum value in the subgroup of readings entered for length.

NINT( )

Nearest integer.

NINT(VAL[Length])

Note. Computes nearest integer to the reading entered for length.

NOMSL

The center point between the nominal specification lower limit and the nominal specification upper limit (LSL, USL).

NOMSL[Length]

PI

π (3.14159)

(VAL[Diameter]) * PI

Note. Multiplies the reading entered for diameter by 3.14159.

RANGES

Range of subgroup of readings entered for a characteristic.

RANGE[Length]

Note. Computes range of the subgroup of readings entered for length.

SQRT( )

Square root.

SQRT(VAL[Length])

Note. Computes square root of the reading entered for length.

SSIZE

Subgroup size of the current characteristic.

SSIZE

STDDEV

Standard deviation of subgroup of readings entered for a characteristic.

STDDEV[Length]

Note. Computes standard deviation of the subgroup of readings entered for length.

USL

Upper specification limit of the current characteristic.

USL

VAL

Reference to the current sample for the characteristic.

VAL[Length] * VAL[Width]

Note. The equation processor works from sample 1 to sample n within the current subgroup and attempts to reference the characteristics that make up the derived one.

Measurement Plan Review

QS_MFDSLEVEL2_INQ

Quality, Review Quality Plans, Measurement Plans, Measurement Plan Review

Review current characteristic information or historical specification changes.

Characteristic Specifications

QS_MFDSSPEC_INQ

Quality, Review Quality Plans, Characteristic Specifications

Review current specifications and historical changes.

Date From

Enter a starting date from when you want to review the full specification history. Select the Full History check box to enable the starting date.

Note. The system initially displays the current date minus one day.

Full History

Select to review the entire specification change history. Deselecting this check box disables the Date From field.

Active Only

Select to review only current characteristic specifications.

Graph Results

Click this button to launch a Pareto analysis of the original summary value for each inquiry.

See Using PeopleSoft Quality Graphics.