Where large numbers of similar ships are to be built the cost of the enormous amount of work involved in designing a ship can be distributed over all the ships of the series, since most of the documentation can be used over and over again.
Apho amanani amaninzi eenqanawa ezifanayo efuneka akhiwe izabiso lemali enkulu yomsebenzi wokuzotywa kwenqanawa uhgasasazwa kuzo zonke iinqanawa zolu thotho, ngenxa yokuba uninzi lwamaphepha okanya amaxwebhu lungasetyenziswa kaninzi.