The applicant employer assigned the maintenance, repair, and inspection of a newly installed Pfaff screw hoist to millwrights from the ATU.
The IAM disputed this assignment, claiming the work based on past practice with a previous hoist.
The Board found that both unions had members qualified to do the work and that past practice was mixed.
Ultimately, the Board upheld the employer's assignment to the ATU, finding it justified by economy and efficiency considerations, including the ATU members' prior experience with similar hoists and a shared management structure.
