The following bits are used for the HAWK-I score flag:
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bit	parameter	criterion
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A) Processing quality:
1	TPL_COMPLETE	template completely executed? yes --> 0; no --> 1
2	DT_TWFLAT	time difference to applied twilight flat > 21 days --> 1
B) Quality of product:
3	NUM_NONLIN	number of pixels having more than 25000 ADU (i.e. non-linear pixels)
			in first raw file below 10000? yes --> 0; no --> 1
4	NUM_ZPSTARS	standard stars for zeropoint calculation found in FOV?
			yes --> 0; no --> 1
5	ERROR_WCS	error on WCS < 0.3 arcsec? yes --> 0; no --> 1
6	IMAGE_QUALITY	image quality > 0.3 arcsec? yes -- 0; no --> 1
7	ELLIPTICITY	ellipticity of stellar sources < 0.25?
			yes --> 0; no --> 1

These are the most frequent score bits:
0000000		no quality issues
1000000		template exection was aborted, it could be that the same template was started a second time