Which of the following statement related to PMO is not correct? ( )

Precedence Diagramming Method（PDM） is a method used in activity sequencing. There are four types of dependencies or precedence relationships in PDM. The initiation of the successor activity depends upon the completion of the predecessor activity is called （ ）.

When multiple routers are used in interconnected networks,the routers exchange information about （ ） using a dynamic routing protocol.

The parties to government procurement refer to the principal entities of all kinds that enjoy rights and undertake obligations in government procurement，including the procuring entities. The （ ） and the procuring agencies.

Configuration management system can be used in defining approval levels for authorizing changes and providing a method to validate approved changes． （ ） is not a project configuration management tool

The schedule management plan is a component of the project management plan The schedule management plan maybe formal or informal,highly detailed or broadly framed,based up on the（ ）of the project,and includes appropriate control thresholds.

Besides the（ ） for process and data of current system，the deliverable from this phase also includes the formal requirements definition for the proposed system.

There are strategies typically deal with threats or risks that may have negative impacts on project objectives if they occur. Some other strategies are suggested to deal with risks with potentially positive impacts. （ ） is a risk response strategy that may be adopted for either threats or opportunities.

（ ）estimating is a technique for estimating the duration or cost of an activity ou project using historical data from a similar activity or project.

The deliverable from this phase also includes the （ ） for the proposed system.