quality assurance for multiple lab/instrument operations
Post on 24-Dec-2015
226 Views
Preview:
TRANSCRIPT
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Branch Primary Functions:
Monitor Cotton Program Quality Assurance Activities
Management of Quality Assurance Checklot Program
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
Approximately 1% of all samples classed each day at each classing office are randomly selected as a checklot for retest by the Quality Assurance Branch
Checklot samples are selected at the classer station by the Non-stop computer after the classification process is complete
The classification data assigned by the HVI or classer can not be changed after the sample is selected as a checklot
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
Checklot samples are shipped to the Quality Assurance Branch via overnight delivery for next day classification
All checklot samples submitted to the Quality Assurance Branch are tested on two separate HVI systems
The test results of the two Quality Assurance HVI systems are compared to ensure the results are within established tolerances
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
Checklot samples with results for any quality measurement that are outside the established tolerances based on the comparison of the two Quality Assurance HVI systems are deleted and not included in the data provided to the classing offices
The results from the two Quality Assurance HVI systems that are within the established tolerances are averaged and used for comparisons to the classing office results
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
Repeatability (reproducibility) and bias are calculated for all HVI factors, classer leaf grade and extraneous matter by comparing the classing office results to the Quality Assurance Branch results
Test results are telecommunicated to each respective office immediately after classification is complete at Quality Assurance
Checklot data is utilized by USDA to ensure all offices provide accurate data to customers
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
Quality Assurance follows the same type calibration and In-house procedures as the Classing Offices to ensure consistency
Quality Assurance also maintains an internal checklot program to ensure that all QA HVI’s and classers are on the same and correct level
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
Crop Upland Checklots Pima checklots
2009 104,251 5,963
2010* 99,914* 1,988*
Checklot Samples Classed
2010 Through 11/18/10Classification of Upland crop 59% completeClassification of Pima crop 26% complete
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
The goal of Quality Assurance is to provide classification results back to the offices the same day the checklot samples are received
During the “peak” of the season, Quality Assurance will operate multiple shifts and work weekends to provide timely data to the offices
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
Quality Assurance classification results are returned to the respective offices immediately after the QA classification is completed
All checklot results from the Quality Assurance Branch are tracked back to the Classing Office, shift of operation, classification date, classification time, classing supervisor, classer, HVI, HVI supervisor, and HVI operator
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
Reports are generated and data are analyzed throughout the day to detect any potential problems or level shifts
If the Quality Assurance staff detects any actual or potential problem, immediate interaction occurs with the office to ensure correction
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
• Leaf Grade• Extraneous Matter• Micronaire:• Strength:• Length:• Length Uniformity:• Trash % Area• Color Rd• Color +b• Particle Count
No Tolerance No Tolerance± 0.13 unit± 1.6 grams/tex± 0.024 inches± 1.2 unit± Equation Based± 0.8 unit± 0.3 unit± Equation Based
Reproducibility tolerances
Quality Assurance For Multiple Lab/Instrument Operations
Leaf Grade Extraneous Matter0
102030405060708090
100
88.899.1
Manual Reproducibility
Results Through 11/18/10
Quality Assurance For Multiple Lab/Instrument Operations
Mike Strength Length Uniformity Trash Rd +b Part. Cnt0
102030405060708090
10086.3
81.6 80.8 79.886.3 90.3 90.6 91.6
HVI Reproducibility
Results Through 11/18/10
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
Quality Meetings are conducted each week to evaluate office performance and identify quality problems or potential problems
The quality meetings include the Deputy Administrator, if available, the Associate Deputy Administrator, and representatives from the Grading Branch, S&E Branch and the Quality Assurance Branch
Quality Assurance For Multiple Lab/Instrument Operations
• Quality Assurance Checklot Program
During the active classing season, the Associate Deputy Administrator, Grading Branch Chief, Quality Assurance Branch Chief and/or other supervisory personnel visit classing offices to ensure proper operational procedures
top related