Kelly Ortberg’s earnings debut as Boeing Co. chief executive officer has gained an element of suspense as workers vote on the same day whether to accept the planemaker’s latest proposal and end a five-week-long strike.

SEATTLE — The Machinists union announced Saturday morning that Boeing has made a new contract offer with a higher wage increase and other incentives in an attempt to end the strike that has paralyzed the company for five weeks. The wage increase comes very close to the union’s initial demand for a 40% hike over four years.