Utilize the input text as a context reference, choose the right relationship between Balfour Beatty and construction from the options. Options: product/material produced, manufacturer, distributed by, industry, position held, original broadcaster, owned by, founded by, distribution format, headquarters location, stock exchange, currency, parent organization, chief executive officer, director/manager, owner of, operator, member of, employer, chairperson, platform, subsidiary, legal form, publisher, developer, brand, business division, location of formation, creator.

Balfour Beatty retreated 3.6 per cent after Britain's biggest builder said first-half earnings figures will be clipped by newly discovered issues with mismanaged construction contracts.

Answer: industry