Yiziphi izinkinga ezingaxazululwa yifoni yevidiyo kwezokuphepha kwezimboni?

• Amafoni evidiyo ezimboni anciphisa ukuthembela ekwahluleleni ngezwi kuphela ngokungeza ukuqinisekiswa okubonakalayo okubukhoma.
• Ziwusizo kakhulu lapho ukulawulwa kokufinyelela, impendulo ephuthumayo, kanye nokubhalwa kwezehlakalo kufanele kwenzeke ngokushesha.
• Ukukhetha kufanele kubeke phambili isilinganiso sendawo, indlela yokufaka, ukuzwakala komsindo, kanye nokuhlanganiswa kwesistimu.
• Kumaphrojekthi ezimboni, ukuthembeka kanye nokugcinwa kwayo kubaluleke kakhulu kunohlu lwezici zesitayela sabathengi.

Ucingo lwevidiyo lwezimboni aluyona nje isikrini esinekhamera; luyidivayisi yokuxhumana yezokuphepha eyenzelwe ukusekela ukuqinisekiswa okubonakalayo okukude ezindaweni ezinzima noma ezilawulwayo, lapho ukuxhumana kufanele kuhlale kuthembekile ngaphansi komsindo, isimo sezulu, ukudlidliza, noma ukufinyelela okunqunyelwe. Ezindaweni zezimboni, ngisho nokubambezeleka okufushane ekuqinisekiseni ubuwena noma izimo zesayithi kungadala ingozi yokusebenza, ngakho-ke amaqembu onjiniyela avame ukufuna izindlu eziqinile, izindlela zomsindo ezizinzile, kanye nokuhambisana okuqinisekisiwe. Ukuze kubhekwe, ukuvikelwa kwe-IP67 kusho ukuqina kothuli kanye nokumelana nokucwiliswa emanzini afinyelela ku-1 m imizuzu engama-30 ngaphansiI-IECimiqondo yokungena esekelwe ekungeneni, kuyilapho izidingo zokudlidliza kwezimboni kanye nokuthembeka zivame ukuhlolwa kanye nezindinganiso ezifana nokuthiI-ISO 9001izinqubo zekhwalithi kanyeI-NISTimikhuba yokulinganisa. Uma uqhathanisa izinhlelo ezihlanganisiwe, amakhasi ahlobene afana nalawaimikhiqizo, izingcingo zezimboni, futhiama-intercom okulawula ukufinyelelabonisa ukuthi izimo zokusetshenziswa ezahlukene zihambisana kanjani nezakhiwo ezahlukene zehadiwe.

Yiziphi izinkinga ezixazululwa yifoni yevidiyo yezimboni emisebenzini yezokuphepha?

Ucingo lwevidiyo lwezimboni luxazulula inkinga yobunikazi kuqala bese kuthi inkinga yokuxhumana ibe ngeyesibili.

Esangweni, esiteshini esincane, echwebeni lokulayisha, noma emzileni ovinjelwe, izwi lodwa lingadukisa ngoba abaqhubi abakwazi njalo ukubona ukuthi oshaya ucingo uyisisebenzi, isivakashi, umakhi, noma umphangi. Isithombe esibukhoma sivumela ithimba lezokuphepha ukuthi liqinisekise amabheji, iyunifomu, indawo yemoto, isimo somnyango, noma ngisho nezingozi ezibonakalayo ngaphambi kokuvula isithiyo noma abasebenzi abathumelayo. Yingakho ukuqinisekiswa okubonakalayo okukude kubhekwa njengengxenye yochungechunge lwezinqumo, hhayi njengesici esimnandi ukuba naso.

Iphinde ixazulule inkinga yokuthi “kwenzekani ngempela njengamanje?”.

Uma iphaneli ye-alamu, indawo yokushaya ucingo oluphuthumayo, noma i-intercom ibika umcimbi, abasebenzi bezokuphepha bavame ukudinga umongo ngaphambi kwesenzo: Ingabe indawo ivaliwe? Ingabe kukhona intuthu, amanzi, noma inkinga yezokwelapha? Ingabe umuntu oshaya ucingo ukhuluma endaweni efanele? Ukuphakelwa kwevidiyo kwenza lokhu kusheshe ukukuhlola, futhi emisebenzini eminingi yezimboni lokho kusheshisa kubaluleke kakhulu kunekhwalithi ephelele yokuqopha. Uma isayithi linomsindo, ukuqinisekiswa okusekelwe kwikhamera kungavimbela ukudluliselwa kwezwi okuphindaphindiwe futhi kunciphise ukungaqondani okubangelwa ama-alamu, imishini, noma ukuphazamiseka komsakazo.

Ekugcineni, ixazulula inkinga yamadokhumenti.

Amaqembu ezokuphepha kanye nabanikazi bamaphrojekthi bavame ukudinga ubufakazi bokuhlolwa, uphenyo lwezehlakalo, kanye nezingxabano zokulawula ukufinyelela. Umcimbi wokuxhumana onikwe amandla ngevidiyo kulula ukuwubuyekeza kunokushaya ngezwi kuphela ngoba ugcina umongo obonakalayo njengendawo eqondile, isimo somnyango noma isango, kanye nokuba khona kwabasebenzi abasekelayo. Ezindaweni ezilawulwayo, lokhu kuthuthukisa ukulandelelwa futhi kungasekela ukubuyekezwa okuqinile kwangemva kwesenzo.

Kungani ukuqinisekiswa okubonakalayo okukude kubaluleke kakhulu kunokuxhumana ngezwi kuphela

Ukuqinisekiswa okubonakalayo okukude kunciphisa ukungaqiniseki ngesikhathi sesinqumo.

Ukwehluleka kokuxhumana kwezokuphepha ngokuvamile akuzona iziphazamiso eziphelele; kuyiziphazamiso eziyingxenye lapho isiteshi sezwi sisebenza khona kodwa umqhubi usentula ukuzethemba okwanele kokuthatha isinyathelo. Leso sikhala siyabiza. Isivakashi singase silinde esangweni elingalungile, i-alamu ingavuswa inqubo engafanele, noma isicelo sokufinyelela singase sivele kumuntu ongenawo umongo wemvume efanele. Ividiyo ivala leso sikhala ngokuvumela umqhubi ukuthi abone indawo ngaphambi kokugunyaza ukufinyelela, ukwandisa isigameko, noma ukuthumela abagibeli.

Lokhu kubaluleke kakhulu kumaphrojekthi lapho isikhathi sokuphendula sihlotshaniswa nemiphumela yokuphepha.

Isibonelo, isiqondiso sokuxhumana okuphuthumayo ezimweni zomphakathi nezezimboni sigcizelela kakhulu impendulo esheshayo, eqondakalayo, neqondayo ngesimo. Isifundo esiwusizo silula: uma umqhubi ekwazi ukubona indawo, impendulo yokuqala ivame ukuba nembaba kakhulu. Ezindaweni ezinomsindo, abaqhubi bangasebenzisa nesiteshi sevidiyo ukufanisa ubuso nebheji, imoto enomyalelo womsebenzi, noma indawo yomshini enemvume yokulungisa. Lokho kunciphisa ukuthunyelwa okungadingekile futhi kuthuthukise ikhwalithi yesinqumo.

Ukuqinisekiswa okubonakalayo nakho kubalulekile emisebenzini yokulawula ukufinyelela.

Esangweni elinabasebenzi, ifoni yevidiyo yezimboni ingasebenza njengendawo yokuqinisekisa engaphambili ngaphambi kokuba kukhishwe isango elijikayo, elishelelayo, noma elivimbelayo. Ezindaweni ezingenabantu, ingaxhumanisa umuntu oshayelayo negumbi lokulawula kude ukuze libuyekezwe bukhoma. Kuzo zombili izimo, umgomo awukona ukuqapha ngenxa yayo; umgomo ukwenza isinqumo ngasinye sokukhishwa sivikeleke kakhudlwana futhi singaxhomeki kakhulu kwinkumbulo noma ekuqageleni.

Amacala okusetshenziswa kwefoni yevidiyo yezimboni kuzo zonke ezokuphepha, ukulawula ukufinyelela, kanye nempendulo ephuthumayo

Ucingo lwevidiyo lwezimboni lusebenza kahle kakhulu uma lusebenza ngendlela ebanzi yokuphepha.

Ekulawuleni ukufinyelela, ingaqinisekisa izivakashi eziseduze, iqinisekise ubunikazi bomkontileka, futhi inciphise ingozi yokungena ngemuva ngokuvumela umqhubi okude ukuthi abone ukuthi ubani ocela ukungena. Ekuphenduleni okuphuthumayo, ingaxhumanisa umuntu oshaye ucingo okhathazekile negumbi lokulawula ukuze abathumeli bakwazi ukwahlulela ukuthi umcimbi uhlobene nezokwelapha, imishini, noma ukuphepha. Emagcekeni ezinto zokwakha nasezindaweni zokugcina impahla, ingasekela ukungena kwamaloli, ukuxhumanisa idokodo lokulayisha, kanye nokulawula amasango ngemva kwamahora okusebenza. Ezindaweni ezibalulekile zengqalasizinda, inganikeza indlela elula kodwa ethembekile yokuxhumana ngesikhathi semicimbi yokufinyelela okuvinjelwe.

Ngezansi indlela ewusizo yokuhlanganisa idivayisi nenkinga eyixazululayo.

Ukufakwa okuhle kakhulu kuvame ukuhlanganisa idivayisi nesofthiwe yokulawula ukufinyelela, i-CCTV, noma isikhungo sokusebenza kwezokuphepha.

Lokho kuhlanganiswa kubalulekile ngoba indawo yokugcina emele iwusizo kuphela uma umqhubi engenza okuthile ngolwazi. Ezinhlelweni eziklanywe kahle, inkinobho yokushaya ucingo, ukusakaza kwekhamera, kanye ne-logic yokukhulula umnyango kuyahlanganiswa ukuze ukuhamba komsebenzi kungahlukaniswa ezikrinini eziningi kakhulu. Yingakho abanikazi bephrojekthi abaningi bekhetha ukwakheka kokuxhumana okuhlangene kunamadivayisi angaxhunyiwe anezindlela zokulungisa ezihlukile.

Indlela yokukhetha idivayisi yokuxhumana yezokuphepha yezindawo zezimboni

Idivayisi efanele yileyo esindayo ezimweni zesayithi futhi isanikeza ukuxhumana okucacile uma kudingeka.

Ukukhetha kufanele kuqale ngendawo ezungezile, hhayi ngobukhulu besikrini. Idivayisi esetshenziswa egumbini lokuhlanza inezidingo ezahlukene zezinto zokuhlanza nezokuhlanza kuneleyo esetshenziswa esangweni langaphandle elivezwe emvuleni, enkungwini kasawoti, e-UV, kanye nokujikeleza kokushisa. Ezindaweni eziyingozi, ukukhathazeka ngokuvalelwa kanye nokuqinisekiswa kuphakama kakhulu ngoba indawo yokuxhumana ngokwayo akumele ilethe ingozi. Isibonelo, izinqumo zemishini yendawo enobungozi zivame ukubhekisela ezindinganisweni kanye nezinhlaka zesitifiketi ezifana nokuthiI-ASTM E2079ngezindlela zokuhlukanisa ezimweni ezithile kanye neminye imithetho yokuqinisekisa esetshenziswa yiziphathimandla zesifunda. Ukuze kuhlale isikhathi eside ngaphandle, ukuvikelwa kokungena kanye nokumelana nokugqwala kuvame ukuba kubaluleke kakhulu kunezimangalo zekhwalithi yevidiyo yesitayela sabathengi.

Ukusebenza komsindo kungenye into engaxoxiswana ngayo.

Ukuphepha kwezimboni kuvame ukwenzeka lapho umsindo wangemuva udlula izimo ezijwayelekile zehhovisi, futhi ukuqondakala kwenkulumo kuba yisilinganiso sangempela. Inkinga akukhona ukuthi iyunithi ingakhala yini; ukuthi ngabe umqhubi angamqonda yini umuntu oshaye ucingo ocindezelekile ekuzameni kokuqala. Kulezi zilungiselelo, ukulawula i-echo, ukuzwela kwemakrofoni, ukuphuma kwesipikha, kanye nendawo yokumisa konke kuyingxenye yesinqumo sokuklama. Isithombe sevidiyo esinamandla asikwazi ukukhokha umsindo ongaqondakali.

Ukuhlanganiswa kubaluleke ngokulinganayo.

Amaqembu ephrojekthi kufanele ahlole ukuthi uhlelo lusekela inethiwekhi ye-IP ekhona, indawo ye-SIP, isilawuli sokufinyelela, noma ipulatifomu yokuphatha ividiyo. Kufanele futhi aqinisekise indlela yamandla, ukufinyelela kokulungisa, ukutholakala kwezingxenye ezisele, nokuthi idivayisi ilula ngokwanele yini ukuthi ochwepheshe basensimini bayisevise ngaphandle kokungasebenzi isikhathi eside. Ukukhetha okuhle kwephrojekthi yileyo enciphisa ukungqubuzana komjikelezo wokuphila, hhayi leyo ebukeka imangalisa kukhathalogi.

Yiziphi izici ezibaluleke kakhulu efonini yevidiyo yezimboni?

Ikhwalithi yokucaciswa ibaluleke kakhulu kunenani lezici zezihloko.

Kubathengi bezimboni, izincazelo eziwusizo kakhulu yilezo ezixhumene nesimo sangempela sokusebenza: isilinganiso sokuvalelwa, izinga lokushisa lokusebenza, insimu yokubuka ikhamera, ukuphuma komsindo, ukuzinza kwenethiwekhi, kanye nokuqina kwamandla. Idivayisi enekhamera enesinqumo esiphezulu kodwa ukuvala isimo sezulu okubuthakathaka ingahluleka ngokushesha kuneyunithi enesici esiphansi eyakhelwe indawo. Ngokufanayo, isikrini esihle siwusizo kuphela uma indawo yokufaka ivumela ukubuka nokusebenzisana okuphephile.

Imingcele yobuningi isiza amaqembu ukuqhathanisa izinketho ngaphandle kokuqagela.

Ukuvikelwa kokungena kuvame ukuvezwa kusetshenziswa imiqondo yesitayela se-IEC 60529, lapho i-IP66 ikhombisa ukuvikelwa okungenathuli kanye nokumelana namajethi amanzi anamandla, kuyilapho i-IP67 ikhombisa ukuvikelwa okungenathuli kanye nokumelana nokucwiliswa kwesikhashana. Ezweni lomshini nokulinganisa, ikhono lenqubo livame ukujikeleza ekubekezeleleni okufana no-±0.005 mm, kodwa kumadivayisi okuxhumana ezimbonini okulinganayo okusebenzayo ukuthembeka ngaphansi kokucindezeleka kwemvelo kunokunemba kwezinga le-micron. Ohlangothini lokuxhumana, izinhlelo eziningi zakhiwe ngokuzungeza izakhiwo ezijwayelekile ze-Ethernet kanye ne-SIP ngoba kulula ukuzihlanganisa nokuzigcina isikhathi eside.

Sebenzisa ithebula elingezansi njengohlaka lokuqhathanisa lobuchwepheshe olusheshayo.

Ukuze kube nombono osemthethweni kakhulu wokucabanga ngokuthembeka, onjiniyela bephrojekthi bavame ukuvumelanisa ukukhethwa kwamadivayisi nezinqubo zokuhlola ezibhalwe phansi kanye nekhwalithi kunezimangalo zesici esisodwa. Leso yisinye sezizathu ezenza abathengi bezimboni babuze ngemibhalo, hhayi nje ubukhulu.

Indlela amafoni evidiyo ezimboni asekela ngayo izinqumo zokufinyelela eziphephile

Amafoni evidiyo ezimboni athuthukisa izinqumo zokufinyelela ngokwenza isinqumo sibonakale.

Ukufinyelela akukhona nje ukuvula umnyango; kuyisinqumo esilawulwayo mayelana nokuthi umuntu, imoto, noma isicelo siyahambisana yini nemithetho yesayithi. Indawo yokuxhumana enikwe amandla yividiyo ivumela umlawuli ukuqinisekisa ukuthi ungubani, abone ukuziphatha okusolisayo, futhi aqinisekise ukuthi indawo ezungeze indawo yokungena iphephile ngokwanele ukukhululwa. Lokhu kuwusizo kakhulu lapho amabheji angabelwana khona, izivakashi zingafika kungazelelwe, noma amasango amaningi adala ukudideka ngesikhathi somsebenzi ophakeme.

Ividiyo iphinde iqinise ukucabanga kokukhulisa.

Uma umuntu oshaya ucingo ebonakala elimele, edidekile, noma engakwazi ukulandela izinqubo ezijwayelekile, igumbi lokulawula lingadlulisela umcimbi kumphathi, unogada, noma oxhumana naye ophuthumayo. Uma umuntu oshaya ucingo elungile kodwa indawo ezungezile ibonakala ingajwayelekile, njengomusi, izithiyo eziphukile, noma umzila ovinjiwe, umqhubi angabamba ukufinyelela futhi akhuphuke. Lolu hlobo lokwahlulela lunzima kakhulu ukulukhipha ngocingo lwezwi kuphela.

Empeleni, amasayithi anamandla kakhulu ahlanganisa ukuqinisekiswa okubonakalayo ne-matrix yempendulo ecacile.

1. Qinisekisa ukuthi ungubani umuntu oshaye ucingo noma imoto.
2. Hlola indawo ezungezile ukuze ubone izingozi noma izinto ezingavamile.
3. Qinisekisa ukuthi isicelo sokufinyelela siyahambisana yini ne-oda lomsebenzi noma ishejuli.
4. Khulula, bamba, noma ukhuphule intengo ngokwenqubomgomo yesayithi.
5. Bhala phansi umcimbi ukuze uhlolwe futhi ubuyekezwe.

Lokho kusebenza kunciphisa amathuba okwenza izinqumo ezisheshayo futhi kuthuthukisa ukuhambisana phakathi nokushintshashintsha.

Iyini imikhawulo yezinhlelo zefoni zevidiyo zezimboni?

Ucingo lwevidiyo lwezimboni lunamandla, kodwa aluthathi indawo yesakhiwo sokuphepha esiphelele.

Ayikwazi ukuthatha indawo yezithiyo ezibonakalayo, ukuqapha, i-alamu, noma izilawuli zokuphepha kwe-cyber. Uma inethiwekhi ingazinzile, inani lokuqinisekiswa okubonakalayo lehla ngokushesha. Uma ikhamera isendaweni engafanele, opharetha angase angabi ne-engeli efanele yokwenza isinqumo. Uma isayithi lingenayo inqubo yokuthi ubani ongagunyaza ukufinyelela, idivayisi ingaba enye indawo yokudideka esikhundleni sendawo yokulawula.

Ubumfihlo kanye nokuphatha nakho kubalulekile.

Noma yiluphi uhlelo oluthwebula ividiyo ngezinjongo zokuphepha kufanele lulandele inqubomgomo yesayithi, umthetho wendawo, kanye nemithetho yokugcina. Lokho kufaka phakathi ukuthi ubani ongabuka ividiyo, ukuthi amarekhodi agcinwa isikhathi esingakanani, nokuthi idatha yesigameko ithunyelwa kanjani ukuze ihlolwe. Ukufakwa okuhle kakhulu kwezimboni kwenza le mithetho icace kusukela ngosuku lokuqala ukuze uhlelo luhlale luwusizo futhi luthembekile.

Ekugcineni, isici somuntu sihlala sibalulekile.

Ngisho nehadiwe engcono kakhulu iyahluleka uma opharetha bengaqeqeshwanga ukubuza imibuzo efanele noma uma inqubo yesayithi ihamba kancane kakhulu ukuyisebenzisa ngaphansi kwengcindezi. Ividiyo kufanele isekele ukwenza izinqumo, hhayi ukuyithatha indawo yayo.

Izindlela ezinhle kakhulu zokusebenzisa ifoni yevidiyo yezimboni

Ukufakwa ngempumelelo kuqala ngokuklama umsebenzi, hhayi ukufakwa kwehadiwe.

Okokuqala, chaza isikhathi sokusetshenziswa: isicelo sokungena, ucingo oluphuthumayo, ukuqinisekiswa konkontileka, noma ukufinyelela ngemva kwamahora okusebenza. Okwesibili, thola umenzi wesinqumo kanye nendlela yokubuyela emuva uma umqhubi engatholakali. Okwesithathu, beka idivayisi lapho ikhamera ingabona khona ubuso, imoto, noma indawo ebalulekile. Okwesine, hlola ukucaca komsindo ngaphansi komsindo wesayithi ongokoqobo kunokuba ube sehhovisi elithule. Okwesihlanu, izinqubo zokulungisa amadokhumenti, izindlela zokuhlanza, kanye nokulindelwe kwezingxenye ezisele ngaphambi kokudluliselwa.

Uhlu lokuhlola lokuthunyelwa olungezansi yilolo amaqembu amaningi ephrojekthi alikhohlwayo ngaphambi kokuba aqalise ukusebenza.

• Qinisekisa ukutholakala kwenethiwekhi namandla endaweni yokufaka.
• Qinisekisa i-engeli yekhamera ngokumelene nendlela yangempela yokusondela.
• Hlola ukubonakala kwasebusuku kanye nokulawula ukukhanya.
• Qinisekisa ukuthi umsindo uhlala ucacile ngesikhathi sokusebenza komshini.
• Qopha ukuthi ubani ongavumela ukufinyelela nokuthi ubani ongabuyekeza amalogi.
• Hlola izikhathi zokuhlanza, ukuvala, kanye nokuhlola.

Uma lawo maphuzu esehlanganisiwe, idivayisi iba lula ukuyithemba ngezikhathi ezibalulekile.

Kubathengi bezimboni abaqhathanisa imindeni yemikhiqizo, amakhasi anjengeizingcingo zezimboni, omakhalekhukhwini bokungena emnyango, futhiizingcingo eziphuthumayosiza ukuhlukanisa izimo zokulawula ukufinyelela, ukuphepha komphakathi, kanye nokusetshenziswa kokuxhumana okuphuthumayo. Lokho kuhlukanisa kubalulekile ngoba isigaba ngasinye sixazulula inkinga yokusebenza ehlukile, noma ngabe indawo ebiyelwe ifana.

Imibuzo Evame Ukubuzwa

Iyini inzuzo eyinhloko yefoni yevidiyo yezimboni?

Inzuzo eyinhloko ukuqinisekiswa okubonakalayo okukude, okuvumela abasebenzi bezokuphepha ukuthi baqinisekise ukuthi bangobani kanye nezimo zendawo ngaphambi kokwenza isinqumo.

Iyiphi ifoni yevidiyo yezimboni ewusizo kakhulu?

Iwusizo kakhulu emasangweni, ezindaweni zokungena ezivinjelwe, ezindaweni zokulayisha imithwalo, eziteshini ezincane, nasezindaweni zokushaya ucingo oluphuthumayo lapho izinqumo zokufinyelela noma zokuphendula kufanele zibe ngokushesha futhi zinembile.

Ifoni yevidiyo yezimboni ihluke kanjani kwi-intercom yevidiyo evamile?

Ifoni yevidiyo yezimboni ivame ukuklanywa ukuze ivumelane nezimo ezinzima, izidingo zokufaka eziqinile, kanye nokuhlanganiswa okungcono nezinhlelo zokuphepha kune-intercom yesitayela sabathengi.

Ingabe ividiyo ithatha indawo yomsindo ekuxhumaneni ngokuphepha?

Cha. Umsindo usaphethe isicelo, imiyalelo, kanye nemininingwane yokwenyusa, kuyilapho ividiyo inezela umongo odingekayo ukuqinisekisa isimo.

Yini okufanele ngiyihlole ngaphambi kokuthenga eyodwa?

Hlola ukuvikelwa kokungena, izinga lokushisa lokusebenza, ukuzwakala komsindo, ukuhambisana kwenethiwekhi, indlela yokufaka, kanye nokulungiselelwa.

Ingabe kungasiza ngempendulo ephuthumayo?

Yebo. Kusiza opharetha ukuthi babone ukuthi umcimbi uhlobene nezokwelapha, imishini, noma ukuphepha, okuthuthukisa ukunemba kokuhlolwa kanye nokuthunyelwa.

Kungani ukuhlanganiswa kubaluleke kangaka?

Ukuhlanganiswa kubalulekile ngoba idivayisi kumele isebenze nokulawula ukufinyelela, i-CCTV, noma ukuhamba komsebenzi wegumbi lokulawula; ngaphandle kwalokho iba yindawo yokuxhumana engaxhunyiwe.

Ngamafuphi, ifoni yevidiyo yezimboni ixazulula inkinga yokuphepha yokungaqiniseki. Ithuthukisa ukuhlolwa kobunikazi, isheshisa ukuqinisekiswa okubonakalayo okukude, iqinisa ukulawulwa kokufinyelela, futhi idala irekhodi elingcono lalokho okwenzekile. Kubathengi bezimboni, ukukhetha okuwinayo akuyona enezici eziningi, kodwa yileyo efanela isayithi, esindayo endaweni ezungezile, futhi ehlanganiswe kahle nomsebenzi wokuphepha.