The PSA promised to suspend industrial action if employers discontinued the lockout .
The company responded with a lockout and threats it would relocate production to Thailand.
Management offered to lift the lockout if employees accept a proposal allowing the company to cut jobs and working conditions.
Management claimed the lockout was a temporary measure and that the plant would be reopened on May 9.
the union took strike action and management responded with a lockout
Management will also be free on that date to impose new contract terms or institute a lockout .
Union leaders said they expected the lockout and blamed the employers for inflaming already tense negotiations.
The lockout was in retaliation against industrial bans imposed by employees for a 15 percent pay increase over three years.
Workers believe the lockout is part of management plans to shift the entire operation to Vietnam, where labour costs are lower.
A strike by Norwegian offshore oil rig workers entered its second month this week, with employers threatening a lockout .