please try to understand that 1|2|3 means shifts & A,B,C,D&E means Male worker & F,G,H,I &J means Female. Group/Nature of job means as under to make categories to fill up the Form. It is displayed at gate to show daily strength of manpower. However same send to the authority first time also or any change in shifts timing .
Group / Nature of Job
A/F - Managers/Supervisors Etc
B/G - Clerical staff etc
C/H - Operators/Fitters /etc
D/I - Helpers
E /J - Misc S/G, Sweeper etc
I hope you will understand. Pleas try to fill up Form 11 of your Factory and take advise from you senior.