"This was achieved by significantly improving communication with our employees and instituting a number of post-strike studies and remedial actions," it added. Kumba is a unit of Anglo American and is the biggest contributor to the latter's profits, making it a stand-out in the global mining group's troubled portfolio in the southern African region, which includes the world's top platinum producer Anglo American Platinum (Amplats). Amplats is still reeling from an almost three-week strike in the platinum sector by the hardline Association of Mineworkers and Construction Union (AMCU), which has poached tens of thousands of members from the once-unrivalled National Union of Mineworkers (NUM) in the labour conflict. Amplats also faced a number of brief strikes last year as AMCU protested against planned job cuts.