03/08/2023 - Articles

Introducing software after big bang: Fast and smashing

Fast, but not without risk: In the big bang approach, the new software system is implemented at a defined point in time with full functionality. Here you can find out how the method works, where its advantages and disadvantages lie, and whether the big bang method can be used purposefully for your software introduction project.

Big bang software launch - what does it mean?

The big bang method is one of the best-known software rollout strategies. In the big bang strategy, all software modules are activated for all users on a specific date. From this point in time (milestone), the new software replaces the legacy system holistically, so that users do not have to maintain processes in the new and legacy systems in parallel. Big Bang is the fastest and most cost-effective implementation strategy for large companies, because there is no need to pay for, maintain and interface multiple applications in parallel - provided everything goes according to plan.

What should be considered when implementing software using the big bang method?

With the Big Bang implementation strategy, precise planning is very important and decisive for the success of the implementation project. If problems occur, a Big Bang implementation quickly causes high costs. In the worst case scenario, if the implementation project is aborted and fails, it is not possible to "roll back" to the legacy system and all business processes come to a standstill.

The abrupt change to a new solution can be too much for many employees - acceptance problems arise. In the worst case, the new software is not accepted and the intended goal is not achieved. Therefore, it is already of great importance to pay attention to intuitive usability when selecting the software. The introduction of complex enterprise software causes problems especially if a company has not used similar software before. If different software solutions were used before, which are now to be replaced by an ERP system, the migration of the data often causes problems.

A preparatory phase is particularly important in a software implementation using the big bang method in order to minimize the high risks of the big bang implementation strategy. The technical system administrators and key users (key users/champions) must be trained in advance by the software provider's user consultants. In addition, the new software must be subjected to extensive testing in advance, with as much real data as possible. The software provider already develops all the necessary interfaces during the preparatory phase.

Software implementation after big bang: advantages and disadvantages

  • Rapid implementation: The Big Bang method makes it possible to get a software solution up and running quickly. Instead of wasting time and resources on a phased rollout, the entire company can switch to the new software in the shortest possible time.
  • High risk: A software rollout using the big bang method is associated with higher risks than a phased rollout. If problems occur during implementation, they can be more severe and affect the entire company.
  • Manageable costs: the Big Bang method can reduce overall costs by making implementation faster and more efficient.
  • Major impact on business operations: Because the big bang method updates all systems and processes at once, there can be a major impact on business operations. If there are disruptions or outages during the implementation, it can affect the productivity and profitability of the business.
  • Avoiding compatibility issues: When an organization implements a new software solution incrementally, compatibility issues with older systems can occur. With the Big Bang method, these problems can be avoided because all systems are updated at the same time.
  • Higher training and customization costs: all employees must be trained at the same time. This can result in higher training and customization costs than a phased implementation, because a phased implementation requires training only a small group of employees, who then pass on the knowledge internally.
  • High motivation: A new software solution can lead to uncertainty and anxiety among employees. With the Big Bang method, all employees manage the changeover to the new software together and work according to the same processes at all times, which promotes motivation and cohesion.
  • Less flexibility: If a problem arises or a change is required during the rollout, this can be more difficult because the systems and processes have already been updated.

A software rollout with Big Bang only makes sense if

A software rollout with Big Bang only makes sense if

  • the management is fully behind the introduction of the software and supports the process,
  • the employees have a positive attitude towards the introduction,
  • the goals and requirements are known,
  • an experienced project manager is available.

Alternatives to the Big Bang Method

In addition to software introduction according to the big bang method, purely iterative procedures, i.e. step-by-step introduction strategies and combinations of big bang approach with iterative strategies, are also possible, which may be more suitable for introduction projects in companies in individual cases.

Purely iterative approaches include:

Project-oriented software implementation

In the first implementation step, the software is used by a motivated project team (test team) for one project. After adaptations, the software is extended to every team and every project company-wide. You can find out more about the project-oriented approach, advantages, disadvantages and tips in the article "Project-oriented software implementation: customization according to experience".

Functional iterative software implementation

The modules of a modular software solution are introduced one after the other. You can find out more about introducing software using the functional iterative approach, advantages and disadvantages as well as tips on how to proceed in the article „Functional iterative software implementation: module by module to success".

Regional or departmental iterative software implementation

The software is implemented step by step across the sites or departments. You can find out more about implementing software using the regional and departmental iterative approach, advantages and disadvantages, as well as tips on how to proceed, in the article "Regional or departmental iterative software rollout".

Combined strategies are particularly suitable for very large implementation projects and offer the advantage that they can be better adapted to the individual needs and requirements of the company. This can sometimes shorten introduction times or increase acceptance of the software introduction. The risks of software introduction after Big Bang are not reduced thereby however in all cases.

Two most common combinations of iterative models with the Big Bang strategy are the following:

  • Big Bang followed by functional iterative rollout: the software is introduced without preparatory agreements on the changing processes after Big Bang. The adjustments are made afterwards.
  • Regional iterative introduction followed by Big Bang: First, the software is introduced step by step across the sites or departments. As soon as enough experience has been gained and the problems encountered have been solved, the software is introduced in the remaining locations according to Big Bang.

How does the big bang approach to implementation become successful?

The introduction of new business software is always a delicate matter, as such a project ties up resources and entails important consequences in terms of business processes. Choosing a strategy that is not suitable for your conditions is one of the 7 most common mistakes in implementation projects. You should avoid this at all costs in order to successfully plan and complete your software rollout.

If you are considering a big-bang enterprise software rollout, there are numerous ways to improve your chances of success. The important thing is to consider the 11 factors that influence the choice of the appropriate strategy and take appropriate actions to optimize these factors. In this way, you can significantly increase your chances of a successful launch of the software.

If you are unsure whether a software implementation according to the Big Bang model is the appropriate approach for your implementation project, you can count on our expertise. With decades of experience in the introduction of complex software solutions, we can support your project team individually and competently through strategy finding, training, workshops and consulting.

Contact Projektron

Use Case: Introduction of Projektron BCS at items GmbH & Co. KG

In 2009, items GmbH & Co. KG, a leading IT service provider in the energy industry, was faced with the challenge of replacing its outdated project management and billing system in 2009. The existing system, an in-house development based on Access, was error-prone, not audit-proof and no longer met the company's growing requirements for (multi-)project management, project controlling and billing of services.

After a thorough market research, items opted for Projektron BCS. Decisive criteria were the comprehensive range of functions, the adaptability of the software, release stability, scalability and data protection compliance. Projektron also offered role-based training and a free test installation to check the feasibility of the requirements.

Due to the foreseeable problems with a gradual changeover during ongoing processes, items opted for a "big bang" approach. This meant that all employees used the expense recording system in Projektron BCS as soon as it was introduced and all projects, invoices and vacation requests were now only processed via the new system.

Although there were expected difficulties in the start-up phase, such as technical adjustments and retraining of individual user groups, the decision to take the "big bang" approach ultimately proved successful. Projektron BCS met items' requirements in terms of functionality, customizability, stability and data protection. The rapid changeover enabled items to work more efficiently and was well equipped for future growth.

Find out more about the introduction of BCS and the diverse use of Projektron BCS by a full-service IT provider in the user report from items GmbH und Co. KG.

"After several months of system setup, employee preparation and finally a data transfer from the old system, we started using BCS in mid-2011. We decided on a "big bang" because of the problems we could foresee with a gradual changeover to the new system within ongoing processes: we switched the expense recording for all employees to BCS immediately from the start, and all projects, payroll accounting and vacation requests/approvals were only run in the new system from this point on."

Elisabeth Königshofen
Project Management Office, items GmbH & Co. KG, Münster

Conclusion: Software implementation after Big Bang

The big bang method is a fast and cost-effective way to introduce a new software system by activating all software modules at a defined point in time. However, the introduction requires thorough planning to minimize risks such as problems with acceptance, higher costs and interruptions to business processes. Intuitive usability of the new software, training of key users and tests with real data are important prerequisites for the success of a Big Bang introduction.

The advantages of the Big Bang approach include rapid implementation, manageable costs and avoidance of compatibility issues, while potential disadvantages include higher risks, greater impact on business operations and less flexibility. The decision as to whether the Big Bang method is suitable for a software implementation project depends on the complexity of the software, the size of the company and, above all, the experience of the project manager and the project team.

About the author

Francisco Josué Artaza has been working with Projektron GmbH for 15 years, currently as marketing manager and user consultant. He is certified according to IPMA, PRINCE2 as well as Scrum Product Owner. He is an expert in software implementation strategies and has developed a tool that facilitates the selection of the appropriate strategy.

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