The long-awaited code of practice from Acas is due to come into force in early September, the DTI announced last week.
The new code will update the existing one on disciplinary practice and procedures in employment and will provide extra guidance on good practice in how to deal with grievances raised by employees.
DTI minister Alan Milburn said the code is designed to complement the new statutory right to be accompanied by a colleague or trade union official under the Employment Relations Act.
"Good practice is not just a matter of fairness towards employees. It also makes it more likely that disputes will be resolved at the workplace and not by employment tribunals."