Why are most large-scale projects unsuccessful?

A project is a success if it achieves its objective and is completed on time and within budget. By these criteria most major projects are failures,

Some of the reasons:

• Poor risk assessment and lack of effective project risk analysis and management
• Lack of project management authority
• Poor estimating
• Poor planning
• Ineffective project team management
• Unclear objectives
• Poor monitoring and control
• Lack of learning from mistakes.

Actually there are numerous but mainly

1. Poorly defined Scope

2. Incomplete requirement Analysis

3. Inadequate Risk Management

4. Not considering factors which influence cost over entire project life cycle

5. Project in the hands of Inexperienced/Incompetent Project Manager or Team 

Most of the cases I saw start from TOR and contracts nobody (client or vendor) knows exactly their rights or their limits in other word we have lack for contracting management, which is the core of every project, specially the big projects

1. At the outset, inexperienced and incapable project management personnel being deployed in the large scale project.

2. Continual and never ending engineering revisions and modification indulging project schedule predominently.

3. The failure in procuring necessary permanent, temporary tools & tackles and consumables leading the project unsuccessful. The systematic and realistic procurement policy in any company can say any projects's fortune.

4. Deploying inexperienced and unskilled trades personnel is being hampered project schedule. The stringent HR policy and commitments would balance this issue. During peak time the incapabilities would endanger project's tight schedule.

5. The owner & Contractor's relationship in all aspect and level would lead project's success or else unnecessary ambiguity and disagreement would possibly leads project's delay.

• Frequently Change Requests in scope
• Resource Unavailbility
• Cost Fluctuation
• Quality Issues
• Changing in prioritizing the tasks