Name	Notation	Description	Types	Status
Sufficient and all of acceptable quality	1		Concept	stable
Sufficient but partly of acceptable quality	2		Concept	stable
Insufficient but all of acceptable quality	3		Concept	stable
Insufficient and of unacceptable quality	4		Concept	stable
Some messages not complete	5		Concept	stable
Suspect or wrongly coded groups could not be interpreted confidently	6		Concept	stable
Gross coding errors	7		Concept	stable
Transmission sequential order not observed	8		Concept	stable
Report completely garbled and thus discarded	9		Concept	stable
Deficiencies identified and rectified	10		Concept	stable
Deficiencies identified but not rectified	11		Concept	stable
Deficiencies not identified	12		Concept	stable
Measuring errors	13		Concept	stable
Mutual inconsistency	14		Concept	stable
Temporal inconsistency	15		Concept	stable
Forecast error	16		Concept	stable
Bias	17		Concept	stable
Improve system of quality control	18		Concept	stable
Expand training programmes	19		Concept	stable
Missing value	127		Concept	stable