Changed requirements of the client can be exchanged for other concessions. However some difficult changes may be demanded unilaterally by the client. Easy objectives can help. Objectives that are exceptionally difficult, either individually or collectively can cause problems. Clear objectives can reduce confusion and open new opportunities.
Ambiguous objectives are the reverse.
In particular, misinterpretation of the requirements can cause problems and aggregate existing ones. Trust between individual or organisations can help with risk identification and control. However a lack of trust can aggregate existing risks and result in late warning of new risks which may slow work as a result of delayed payments. Payment timing . The late payment of subcontractors can sometimes be beneficial, but it can also cause problems if they retaliate.