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Yes, on behalf of the owner, if any non-conformance or negligence by the contractor is observed.
no, as he is not the owner and the sponsor
In my opinion If there is any valid reason for project not to be completed, then the project manager have the right to consider this option. It is always better to stop at the right time than to face failure, loss of funds a trust. However proper analysis should take place before such decision. The project can be kept on hold during the assessment period, however this should not take long due to the resources which could have been allocated on another assignment.
The authority of the project manager depends on the type and structure of the company he works for. If it's completely projectized ( such as most of the construction company) then he has more authority to terminate the project for any inconvenience or for project going out control of it's planned objectives.
In other company structures, the decision is shared between the project manager and the sponsor or executive manager. more like a suggestion.
on other types, the project manager has no authority on any decision (like cost, time or risk) but to coordinate people.
The project manager need to communicate efectively with the Project Owner or senior executives management related to any project issues and the reasons for stop/terminate the project. So, In my openion, the project manager does not have the authority to stop work on the project for any kind of reasons, but his authority is just to execute the project by deployimg the existance resources.
Yes, project manager has the authority to hold the project for any reason that could impact the project negatively in areas such as scope, quality, unbudgeted and unnecessary cost, health and safety. However, i think a smart PM should have a contingency plan for this stop or hold in order to make sure that the project will not be delivered late, especially if there are penalties for later delivery. Moreover, taking such a decision is recommended to be based on a risk assessment, shared with project stakeholders holders and approved by project sponsor.
Project manager has the right to stop a certain work in the project but it doesn't mean that he can just stop it due to hes logical reason, a well oriented project manager will and always coordinate first with his team of engineers before he will make a certain decision. a project does not only composed of a project manager it includes a team of professionals that will help the project manager in making a fair and quality decisions.
The project manager technically should not have the authority. Having said that, he needs to involve the project sponsor and let him/her know about the state of the project, and then take a mutual decision on a consolidated basis.
I think the answer will be yes, he owns this rule especially in the construction projects when he discovers any actions from the contractor which they valuated as an out - work specifications actions, and they lead to bad consequences on the structure and its users
Yes, a project manager should stop construction or the project if it is a matter of safety or ethical reasons, however he/she has the responsibility to make the share or stake holders aware of the situation .... what good is it to place a building on a spot which has been overlooked and a sinkhole is starting to form... or lives could have been saved if people would have listened to the engineers about the failing O rings on the space schedule;
Yes, he/she should stop the project and checking on the issue ... a human live is more worth than a few days delay in a project or even close it down ... yes the project manager should account to the owners/stake holders and why it been done ... any project with a problem should be shut down, being investigated and proper measures initiated to fix the problem ... in most cases fixing the mistake now is less costly than fixing it when the project is completed