According to the Project Management Institute [PMI] (2017, p.1), project management body of knowledge (PMBOK) is defined "as a term that describes the knowledge within the profession of project management", it incorporates traditional and innovative practices, and it is constantly evolving (PMI, 2017, p.1) whereas "a project life cycle is the series of phases that a project passes through from its start to its completion, it provides the basic framework for managing the project" (PMI, 2017, p.19), the project lifecycle is divided into process groups like initiating, planning, executing, monitoring and controlling and closing, each of these is responsible for reaching specific project objectives (PMI, 2017, p.23). It is important to understand the difference between a project methodology and PMBOK, the methodology is "a system of practices, techniques, procedures and rules used by those who work in a discipline while PMBOK is a foundation upon which organizations can build methodologies, policies, procedures, rules, tools, techniques, and life cycle phases needed to practice project management" (PMI, 2017, p.2), overall most of the knowledge about project management comes from the PMBOK or is created based on this guide.

• Project management methodology impact on project management lifecycle stage(s)

There are several project management methodologies or models but the most widely known are waterfall and agile. "Agile project management is a method of managing projects in small, incremental portions of work that can be easily assigned, easily managed and completed within a short period of time" (Heldman, 2018, p.283), one of its perks is that gives the team a chance to adapt to new requirements or changes (Heldman, 2018, p.283) while waterfall project management has a more traditional approach where "the deliverable is defined in detail before any work starts, it is difficult to change requirements or incorporate new ideas" (Heldman, 2018, p.283), when using this model it is necessary to complete each phase before starting the next, which seems rigid but it has the benefit of the organisation and order.

The lifecycle stage that is most impacted by project management methodologies is planning, this is the stage where it is a must to use all the project management knowledge to organise how the other stages of the project are going to work, for example, the time frame for each phase, budget, resources in general, this step is one of the most important ones of the project since without a proper planning process there is simply no project at all, overall every stage of the project is important because a project can fail on any instance but the step where it is needed to spend the necessary amount of time to ensure everything else will run smoothly is planning.

• Alignment between the lifecycle of the project and the implementation of a project management methodology

The easiest way to ensure alignment between the lifecycle of the project and the implementation of a project management methodology is to make sure that the methodology being used is the most appropriate for the project, it is true that any model can be used on any project but there is also project characteristics to consider before making this decision, for example for projects related to construction it is way easier to work with a waterfall model since the execution can't be done without all the permits and area studies, these kind of projects need a lot of structure while a project related to information technology (IT) can easily use an agile methodology because this field requires a lot of feedback from the user to make it better, so small tasks in a short time is the best way to proceed. According to Heldman, (2018, p.283) the manager can also use a combination of models that is called hybrid, this methodology includes the best of waterfall and agile models, at the end the most important part is making sure that the project has the best methodology that aligns with it.

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