After an extended genealogical research it is possible with a genealogical software to calculate and represent graphically the degree of relationship, affinity and so on.
Among the reasons to calculate the relationship degree there is the possibility to establish relationship between two future spouses, so to avoid the arise of possible genetical hereditary illness.
The cost of the work depends by the complexity of the research.
The written relationship is the list of the realtives of a person, stating the related degree among them and that person.
The relationship chart show all the members of a family and their single relationship with the desired person.