semantics of the term handover implies that something is given away to somebody else. To manage the above-listed handover contexts, Ericsson has over the years developed different R&D processes including handover activities in which the handover has proven to be quite. Other handover contexts at Ericsson : In addition to the above-listed contexts, Ericsson manages the following handovers: o from customer requirements to product management within Ericsson, o from product management to R&D, o from FOA (first office application project) to customer, o from customer complaints and escalations to Ericsson support and maintenance organization, o from HW design to production (factory), o between internal organizations when structure or site strategy are changed, o between organizations from designers suggesting design changes for a certain function to system and product management, o from one supplier to another in cases when suppliers change, o from external consultants to Ericsson o when acquiring other companies.This context does not have any corresponding context in Figure 1. This type of handover strongly promotes reuse of. The only difference is the fact that the components are acquired from other Ericsson companies and used internally within Ericsson. Figure 2) : Ericsson has recently started with inner source. For this reason, organizations should define ways for effective identification of open source assets on the Internet. Sometimes only 20% new code is needed to differentiate some products or subsystems from similar products provided by the competitors. According to the second author of this paper, some products may include up to 80% of open source code and still be competitive and unique on the market. Figure 2): Ericsson is the acquirer of many components provided by various open source communities. The handover takes place between the primary and secondary contractors. Ericsson Handover 4 : Here, Ericsson is the primary contractor delegating development and maintenance of some product part(s) to its subcontractors. In this context, the handover takes place from the R&D group to a development group. Its results are decisive for determining whether a development of a new system will take place. During pre- development, one tests new system designs, creates prototypes, and tests new technology and feasibility of realizing some software intensive business concepts. Ericsson Handover 3 : Here, the development phase is preceded by a pre-development phase, which is the embryo of development projects. This context corresponds to Context 5 in Figure 1. As soon as one realizes that the system is no longer evolvable, one transfers it to another group for servicing, that is, for attending to its defects only. Each new df variable shadows the previous one. In this case, you define multiples let df =. It is optional, and you can also use variable shadowing in Rust. To each transformation is assigned a new variable df_xxx.In the C/C++ languages, the if code block is a statement: it doesn't produce any value. code blocks return a value that we can assign to a variable. It shows that Rust is mainly an expression-based language: if, if let, match. I define all my data operations with the following code let df_xxx =.We have finalized our data transformation function. We write the final results in CSV or Parquet format (9). (8)-(9): Finally, the output format is inferred or specified by the end-user (8).(7): we apply a simple limit operator, limiting the number of lines written.(3)-(6): if the end-user has specified a filter transform, we load and validate the parameters (3), get the column type from the schema information (4), extract and validate the filter value (5) and finally apply the filter operator with eq (equality) mode using the extracted end-user specification (6).I print it as debug information if the verbosity logging is enabled. (2): with the schema operator, we access the inferred data schema used by the framework.With this object, we can call the other Apache Arrow DataFusion operators. (1): we link a dataframe object to the previously mapped “input” file.→ Rust «structures» = (1) # enum WriteFormat The MDataAppError enum is our error management type defining error cases.The WriteFormat enum specifies the file format handled by our application.Before diving into the data transformation code, I define two small enum utilities:
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