The Toronto Transit Commission brought a jurisdictional dispute concerning the assignment of work on a new sandblasting machine at the Hillcrest shop.
The work was assigned to the Amalgamated Transit Union Local 113, but the International Association of Machinists and Aerospace Workers Lodge 235 claimed the work should have gone to its members.
The Board considered factors including past practice, economy, and efficiency.
The Board found that employer preference, economy, and efficiency favoured the assignment to the ATU members, as taking the work from them would disrupt an integrated production process and increase costs.
The Board upheld the assignment of the work to the ATU.